my profile never disappeared. i have all of my old saved games. it's just that i lost all of my suit modules...and probably weapon upgrades.I think that the game re-created the files in your profiles folder after your crash... You can still see your saved games because the profile folder itself is still there. The re-typing of the login also implies that your profile files are the issue:
If you could get back your singleplayer profile from before the crash you should be golden. Although that thread was ultimately about a different glitch, Blutar666's idea here might help:
For me, restoring like mentioned before would work. Are you able to do this too? When I am right clicking my profiles folder i am getting this:
So I could even restore a version of the whole folder from the 9th of july.
So, you would right-click on
C:\Users\<username>\Saved Games\Crysis2\profiles, select "Restore previous versions" and try to restore the most recent version from before the crash.
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