Having the same problem as everyone else. All scans except "System Junk" work fine. But "System Junk" scans get hung up at exactly 50%. I've uninstalled and reinstalled. I'm using the most up-to-date version (18.2 5964). This has been happening for months, making the program worthless.
As requested by the moderator, logs have been sent using the tulogcollector.exe