These products recently removed a spotty feature they had to control the number of autosaves that were stored...and now nothing is ever deleted resulting in years of old files. It would be nice if CC would allow a certain number of the most recent files to be kept.
Autosave location is stored in registry at HKCU\Software\FinePrint Software\FinePrint9\AutoSaveDir
Decend sort that location by creation date and rmove everything after the last N files.
PDFFactory (Pro) autosafe location stored at HKCU\Software\FinePrint Software\pdfFactory6\AutoSaveDir
These registry keys change with each new major revision of the software...and more than one revison can be installed at once.