Jan 31 2026: APP 2.0.0-beta40 will soon be released with many fixes especially for Linux, upgraded development platform and 10-20% performance boost !
Jan 15 2026: FIXED LICENSE SERVER VPN Tunnel issue
 The issue could have prevented APP to start when using a VPN tunnel or another complicated network configuration, like using APP on a remote computer on a different continent. This issue is fixed now and APP should start normally.
Jan 04 2026: Update on the 2.0.0 release & the full manual
We are getting close to the 2.0.0 stable release and the full manual. The manual will soon become available on the website and also in PDF format. Both versions will be identical and once released, will start to follow the APP release cycle and thus will stay up-to-date to the latest APP version. Unfortunately, Mabula was struck by a severe flu virus in the past couple of weeks and thus could not work. He is getting much better now and he has resumed work to release 2.0.0 as soon as possible. Once 2.0.0 is released, the price for APP will increase. Owner's license holders will not need to pay an upgrade fee to use 2.0.0, neither do Renter's license holders.
Nov 28 2025:Â APP 2.0.0-beta39 has been released !
I am having problems using my mouse scroll zoom - the screen now goes black instead of zooming in as it did previously. Also, the image window sliders (horizontal scroll and vertical scroll) are frozen to one side and do not slide rendering them unusable. I wan on 2.0.0.-beta 9 before, can I go back to that version?
Yes you can revert back to any previous versions. They are all available under the tab "Downloads" of the website.
@carsan Could you let us know if going back to that version works? Because it should work on beta 15, would be interesting to know as it can be an issue on your system as well.
I am having problems using my mouse scroll zoom - the screen now goes black instead of zooming in as it did previously. Also, the image window sliders (horizontal scroll and vertical scroll) are frozen to one side and do not slide rendering them unusable. I wan on 2.0.0.-beta 9 before, can I go back to that version?
Hi @carsan,
Can you provide more information about your computer? Which operating system are you running for instance? Is the problem gone if you disable OpenGL with the top left OpenGL button?
Beta15 had a fix for 2 OpenGL issues and these were addressing issues like this, on our test systems it all works fine. You can test beta16 as well which I just released.
Mabula
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I'm not sure if I was running Beta 15 or 16 because I deleted it. I have since downloaded Beta 16. I'll give Beta 16 a try tomorrow to see if the scroll and zoom issues are still there. Thanks, Carol
Here are my computer specs:
Windows 10 Home (x64) Version 22H2
ProcessorÂ
3.20 gigahertz Intel Core i7-8700
384 kilobyte primary memory cache
1.50 megabyte secondary memory cache
12 megabyte tertiary memory cache
64-bit ready
Multi-core (6 total)
Hyper-threaded (12 total)
Main Circuit BoardÂ
Board: Dell Inc. 0DF42J A00
Bus Clock: 100 megahertz
UEFI: Dell Inc. 1.1.18 09/06/2021
Local StorageÂ
7.98 Terabytes Usable Local Storage Capacity
4.04 Terabytes Local Storage Free Space
Thanks! If you could report back if the new beta does work, that would be very helpful.
@vincent-mod It has a similar problem on beta-16, when you finish any adjustment such as "star reducer" or change the slope in "calibrate star colours", the image viewer will become black, and you have to move the image or roll the mouse roller to get them back, feel like the image viewer shows at a wrong position.
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"@vincent-mod It has a similar problem on beta-16, when you finish any adjustment such as "star reducer" or change the slope in "calibrate star colours", the image viewer will become black, and you have to move the image or roll the mouse roller to get them back, feel like the image viewer shows at a wrong position."
Yes, besides my image viewer sliders not working, I had that same issue. The image viewer would be black when image is regenerated and image was off the screen to the right and extremely large/zoomed.Â
I have not tried APP since I reloaded it, beta 16.
Carol
Interesting, I'll forward it to Mabula.
Hi @alexlee24 & @carsan,
Thank you very much for reporting this issue and when it occurs (when using the reported tools). I will fix this quickly 😉
There is a simpel workaround at the moment that should fix it for now as well. Simply click on the top left OpenGL button 2x, the first click disables the OpenGL image viewer, the 2nd click will enable it again after which it should work properly again.
Mabula
Hi @alexlee24 & @carsan,
Can you donwload 2.0.0-beta17 and check if all is okay now on your systems?
Mabula
@mabula-admin I'm not at home now, but I am using the remote desktop to check beta-17, the image viewer getting black screen problem is solved now.
When I get back home I'll check about it and reply if it has another problem.
Thank you!
Alex
Mabula, THANKS! Beta 17 is working great. The new beta is greatly appreciated.
Carol
@mabula-admin I'm not at home now, but I am using the remote desktop to check beta-17, the image viewer getting black screen problem is solved now.
When I get back home I'll check about it and reply if it has another problem.
Thank you!
Alex
Hi @alexlee24,
Excellent, thank you for your feedback ! It's my pleasure 😉
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