I loaded DOSSHELL onto my HDD. To prevent the OEM VMC software from loading, press the F8 key at boot up. This allows you to selectively load or reject any program in the AUTOEXEC.BAT and/or CONFIG.SYS files.
ANY program that isn't a generic DOS program can be said "NO" to and it won't load thus you won't load the TorqCut operating software. You might have to play around a bit and say no to everything which should give you a pretty basic DOS only O/S.
If you have DOSSHELL loaded on the HDD, you can go into it and use its GUI function simply by loading it by typing in "CALL DOSSHELL"
Once it loads, you can delete files or otherwise do file moving/maintenance. If you don't use DOSSHELL, you can get to a C:\ prompt via the same means and use DOS commands to perform file maintenance as you see fit.
You should then be able to use "DEL *.pgm" from the C:\ prompt to delete any/all PGM suffixed files. This is not selective as it will delete ANY/ALL with the PGM suffix or any other files that you may specify.
IT is frankly easier/safer to tag what you want deleted via DOSSHELL and only dump or download what you choose.
After you download/delete the junk, run DEFRAG while in DOS afterwards to clean up/unragment the HDD. You may also want to run SCANDISK to check the drive for errors or bad sectors.
NOTE: if the drive was properly formatted, you should only be able to "find" 509kb as this was the standardized format that BPT used regardless of the true HDD formattable size.