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 a new member of this community as of today. I have quite a large set of data that are stored with the according MasterDarkflats and Masterdarks generated using PI. As I want to use APP for stacking in the future I would like to use a mix of "Old data" with according PI Masterfiles and new data in APP. I can export these .xisf files as .fits files. Is this a workable solution or what I will lose by this conversion? Original dark and flat files are not saved. Worst case I recalibrate the Old data in PI and saved the calibrated data, but that is a quite cumbersome workaround.
Hi @gunterk2,
Regarding your old masters and using them in APP.
1) convert them to FITS first
2) Then load your converted masters as single calibration frames, so load the old masterdark as a dark in APP, then APP will analyze it and make a MasterDark for APP with relevant metadata. That would be the best way to go. Same for the masterFlats.
Did you try this, is all working okay?
Mabula
