Version 2.0.0.988 on x64 Windows 7
System Cleaner was set for the safest File Cleaner settings, and to flush a small directory structure, and to empty another small directory structure, without automation.
It got an access violation soon after Start was clicked and the backup dialog was told "Yes."
*jv16PT_debuglog.zipbugreport.zip
Another bug: after doing "Change settings" for the File Cleaner, the descriptive text no longer "word wraps," even in a new PT session.