When running Show Differences on a workfile, upon closing the Diff tool, Version Manager releases 8.2.0.0 and 8.2.0.1 attempt to delete the file used in the Diff operation from the current directory. Please see the linked KB article for a HotFix that can prevent this from happening.
Possible data loss when checking into branches following switch to NOGENERATEDELTA on existing split archives served by File Server releases prior to VM 8.3