The data mismatch error appeared ever since patch 9 was initially launched (on my end). I am using the GOG offline installers and this is the content of the "galaxy_4.1.1.2084795_alteredFiles.txt" file:
Version: 4.1.1.2084795
Platform: galaxy
-------------------------
Altered/Added files 2
EULA.txt
webcache.zip
-------------------------
Files in Mods folder 0
Again, the content of the file is identical even with the latest hotfix installed (obviously the version number changes). It appears to be a false alarm or at least not a severe issue of data mismatch.
