1. SFV and MD5 files only get deleted if there has been an archive unpacked. How about being able to delete these after the parity files have completed their checks successfully? Most music gets posted with just parity files and the music files are not in a Winrar archive. So maybe relocate these delete file options up by the "clean-up par files" options and be able to delete them even if there is no call to Winrar.
2. Quick par also supports SFV and MD5. If there are no *.par files found in the queue perhaps it could then load up the *.sfv file or *.md5 file, if one of those are available.
3. I would also like to suggest that if after an nzb is processed and it has processed successfully (with a par, sfv, md5 check and then any possible un-rar) that the nzb be removed from the queue automatically aswell as the par files on the par tab. By not seeing the file(s) in queue or the par tab, it would indicate success.
4. A download folder button up at the top of GUI for your default download folder path. Not sure if that fits in with your download folder plans, as I see there are some people asking for greater control over their download folders.
Again, thanks in advance for any implementation