Where is the compiled program on the PC (before downloading)?
It certainly is not along with the source, not in %USER%/Temp (or in %User%, either), not in %Windows%/Temp, neither is it in %TEMP% or %TMP%, nor in the Brixcc directory. I'm puzzled. (In fact I've just scanned the whole system drive, but I can't even be sure about the filename, so this is all just guesswork, to no avail.)
I think it would be easier if there was a config. parameter in the GUI to tell explicitly where to put the output files.