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Just so easy to use ...  OPAL  ... independent from Internet

Our Services
OPAL 7.4



Free ...

Approved aid and refugee organisations can apply for a free license for OPAL. Just think of the many addresses refugees might have until they find a new home.


Free for me?

Please contact us, if you would like to use our services or OPAL for a good purpose. We are happy to assess and consider your request.


Free Downloads


The following free downloads are available (please note the "Disclaimer"):

Return to OPAL 7.4 menu for an overview to OPAL.




Download Disclaimer: Dolphin's Design Wolfgang W. Rehfus provides high quality and reliable software but is not responsible for any unforeseen effects caused by software downloaded from this site. Every download and the use of downloaded software from this site is subject to the terms and conditions described in the END USER LICENSE AGREEMENT FOR DOLPHIN'S DESIGN SOFTWARE. Please see the form OPAL License-Order for details.



Windows login/lock screen with surfing dolphin ...


Click the image, to display the surfing dolphin in your browser. Then select "Open menu / Save Page As" in Mozilla Firefox Browser or "Tools / File / Save as" in Microsoft Internet Explorer to save the file onto your computer. A short instruction to set the Microsoft Windows Login/Lock screen is here (425 KB PDF).



OPAL Information


The flyer OPAL Information provides a short overview to OPAL. This flyer features some screen shots, summarises the main functions and includes the prices.

Download the OPAL Information flyer now ...  (900 KB PDF , 3 pages)

Note: To view the document, the Adobe Acrobat Reader must be installed.



OPAL Presentation


The OPAL Presentation provides an almost complete overview to the OPAL system with many screen shots and short easy-to-read explanations. The OPAL Presentation is a partly animated and self-running simple slide show.

Download the OPAL Presentation now ...  (10.1 MB self-extracting WinZip file)






1. The file contains the compressed OPAL Presentation. To download the file, click [Save] in the 'File Download' dialog box or click [Run] to download the file and automatically start the presentation.

2. If you stored the file with the button [Save] on your computer, Double-click the downloaded file (OPAL74_Presentation_E.exe) and click [Unzip] in the WinZip Self-Extractor to extract the file. The OPAL Presentation will start automatically. To start the OPAL Presentation manually, click [Run WinZip] and start the presentation with a double-click on the file OPAL74_Presentation_E.pps.

3. To start the OPAL presentation, either Microsoft PowerPoint or the Microsoft PowerPoint Viewer must be installed. Download either the PowerPoint Viewer 97 (2.8 MB) or the PowerPoint Viewer 14 (60.4 MB) from (please note that the Microsoft PowerPoint Viewer had been retired by Microsoft Corporation, for details see their article View a presentation without PowerPoint).






Please note that the size of the screen copy objects (e.g. menus, forms, dialogues) in this simple presentation may differ from the size of these objects in the installed and running OPAL system (e.g. menus are enlarged).

We recommend to download OPAL for free and to install the OPAL system to learn and try OPAL with your own data in your own real live situation. By using OPAL for free you can directly benefit from its user-friendliness and functionality. Please contact us for all your support questions (

Tipp: In addition, you can view the new OPAL 8.0 presentation here ... (or download it here ...).



OPAL Installation - OPAL 7.4 Setup Program


The OPAL Setup Program includes the OPAL installation program, the Microsoft Access Run-Time Version, the OPAL Presentation and the complete online documentation. The download includes a free 99 days test license.


1. Installation notes



Please read ...

OPAL Installation - Quick and Simple! (941 KB PDF )


2. Installation program


Free download ...

Download OPAL 7.4 now ...






OPAL 7.4.571







File name:




File type:

Self-extracting WinZip file



File size:

64.4 MB



Operating systems:

Microsoft Windows 11, 10, 8.1, 8, 7, Vista, XP (please see the download notes for details)






1. Download the file with a click on the link Download the OPAL 7.4 Setup Program now. In the 'File Download' dialog box click the button [Save] or [Save under]. Save the file in any folder on your computer (e.g. C:\OPAL\Setup-Programs\OPAL74571_Setup_E.exe). This executable file contains the compressed files of the OPAL Setup Program.

2. Some Anti-Virus-Programs (e.g. Norton 360) block the download of new or unknown executable files (*.exe) without doing any technical security examination of the file. Such Anti-Virus-Programs delete the file automatically after the download simply because the anti virus program does not know the file. In this case the Anti-Virus-Program must be deactivated temporarily for the download. We recommend to use Microsoft Security Essentials or Windows Defender.

3. Start the OPAL Setup Program with a double-click on the downloaded file. The compressed files of the OPAL Setup Program will be extracted and the OPAL Setup Program will be started.

a)  If Windows SmartScreen prevents running the downloaded file, because Windows SmartScreen doesn't know the application and the publisher, depending on your version of Windows (e.g. in Windows 10) you need to click on "More Info" and then on "Run anyway".

b)  If (e.g. in Windows 10 with Firefox) the dialogs WinZip SelfExtractor "Error 0 running command .\Setup.exe" and the Program Compatibility Assistant "Compatibility settings have been applied" appear, close these dialogs and start the OPAL Setup Program again. In case the Program Compatibility Assistant reappears, click the option "Yes, this program worked correctly" to confirm. In the latest version of Windows 10, this error usually does not occur anymore.

4. For Windows 11, 10, 8.1, 8, 7, Vista please note the instructions

●   OPAL Installation - Quick and Simple!  (941 KB PDF)
and for Windows 8 / 8.1 also the article
●   Windows 8 / Windows 8.1 - operation, tips and suggested improvements  (814 KB PDF)



3. Invitation


You are invited to send us a Registration E-Mail to register your download for free, to request our free installation and start-up support and to receive the latest OPAL information.


You may test OPAL 99 days for free. During the trial period you can order any OPAL license for any OPAL product to continue using the already installed OPAL system and your OPAL database.



OPAL License-Order


This document contains the form OPAL License Order and the END USER LICENSE AGREEMENT FOR DOLPHIN'S DESIGN SOFTWARE. To ensure, that OPAL will be used only for peaceful and legal purposes, license owners are requested to print and sign this document including the OPAL usage restrictions:

I / We confirm explicitly to use OPAL only for peaceful and legal purposes and to agree with the usage restrictions in the End User License Agreement for Dolphin's Design Software: «The SOFTWARE-PRODUCT may NOT be used for activities which do not conform with the human rights or the dignity of man (Universal Declaration of Human Rights, United Nations General Assembly in Paris on 10 December 1948, General Assembly resolution 217 A), which are racist or harmful to the environment. Excluded are particularly the support, production and trade in the areas of military technology, nuclear technology, gen-technology and agro-chemistry. DOLPHIN'S DESIGN has the right to reject license-orders without giving reasons.»

To obtain your exclusive OPAL license, please download this document onto your computer. Complete the order form on page 1 and print the entire document on one A4 sheet (front and back). Sign the completed form and return the document by mail to one of the addresses stated on the form. You will receive your exclusive OPAL license as soon as possible via e-mail.

Download the OPAL License-Order now ...  (557 KB PDF )

Note: To view the document, the Adobe Acrobat Reader must be installed.


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Last modified: 20.03.2024

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