Larian Studios Forums Baldur's Gate III Baldur's Gate III - Technical & Gameplay Problems THE LAUNCHER HAS A DATA MISMATCH ERROR

Ok, I got it fixed. What did it for me, after doing everything that Larian mentioned 3 days ago, was this added bit:

"delete the modsettings.lsx file in the profile folder (EVEN IF you had no MODS installed like me), if you're not using a new profile for the current patch (which I wasn't).
With patch 7, rather than My Documents, the game uses the local appdata folder for the current user account: 'C:\Users\<UserName>\AppData\Local\Larian Studios\Baldur's Gate 3'. The easiest way to get to the profile folders would be to copy the line below into the location bar in Explorer, hit Enter and browse down from there (or on the same level for the '..\Baldur's Gate 3\Mods' folder).
%LocalAppData%\Larian Studios\Baldur's Gate 3\PlayerProfiles

After that, I went to GOG and verified/repaired in the Manage instalation menu (next to the play button). Miracle! The mismatch message is now gone!