What do you think isn't correct the detection (which your VT Results show 14/39 others think something might be wrong with it) or the exclusion that you have applied isn't working ?
The avast Win32:Trojan-gen is generic signature (the -gen at the end of the malware name), so that is trying to catch multiple variants of the same type of malware and is a fine balance between detecting a new variant and detecting something valid as infected.
I would also suggest that you limit the wildcard exclusion further C:\Program Files\Borland\Delphi7\Projects\*.xxx where xxx is the file type for the files being detected. Rather than the C:\Program Files\Borland\Delphi7\Projects\*, which could leave a hole in security as everything in that folder would be excluded from scans.
You could send a sample to avast for further analysis.
If still feel it is a false positive, see
http://forum.avast.com/index.php?topic=34950.msg293451#msg293451, how to report it to avast! and what to do to exclude them until the problem is corrected.
