This came out this morning:
https://forums.eagle.ru/showpost.php?p=3364435&postcount=1Gentlemen, here is some explanations how your current 1.5 (and/or 2.2) will be converted to 2.5, please take a look the attached diagram. Transition will be made in 2 stages:
1 stage: Beta-version. 1.5.8 Open Beta will be updated to 2.5.0 Open Beta. Updater will check 2.2.0 (Alpha) and add necessary modules to 2.5.0. Then Open Alpha 2.2.0 will be uninstalled (user will be prompted about 2.2.0 removing).
1.5.8 release remains as is on this stage.
Some time (maybe one-two weeks, we hope no more) for wide test of this procedure.
2 stage: Release version. 1.5.8 release updated to 2.5.0. User will be prompted before update about saving 1.5.8 Final version in the separate directory.
Modules from 2.2.0 Open Alpha (or 2.5.0 beta - see 1st stage) version will be used for 2.5.0 installation, after that old 2.2.0 will be uninstalled (user prompted).
Open Alpha 2.2.0: this branch is no more supported. If user have only 2.2.0 Open Alpha, we will suggest to download 2.5 installer - it will install 2.5 release and remove 2.2.0 Open Alpha.
Home folders (Saved Games\DCS) remains the same (Saved Games\DCS and Saved Games\DCS.openbeta). New Saved Games\DCS.release_1_5 will be created for 1.5 Final version and all content will be copied into it from Saved Games\DCS. We also strongly suggest to remove Saved Games\DCS\Config\options.lua and make graphic tuning from scratch using DCS GUI because of 1.5 and 2.5 renders are significantly different.