Thanks for the reply, but my backup is corrupted (no archive recognized in the backup file. Only the database is still valid).
Anyway, the distribution for the same version as mine doesn't seem to contain any .htaccess file, so that's not a viable method.
May I borrow .htaccess files from someone else's setup? As I understand it, those files are generated during the first install, based on the actual configuration (i.e. paths and the like), so I'd need to rework a few lines in there, in that case.
Do you think it would work?