I tried uninstalling and reinstalling, but no good. Initially after the reinstall, I did see the catering trucks, and the UHD containers, but the jetways refused to move... I tried the GSX option to move the jetway, the Fenix on board EFB, the FS2Crew Pushback, and finally Ground Services through ATC although the option to request a jetway connection was absent from Ground Services. After exiting MSFS, I went into FSDT installer, and confirmed that CYYZ had been added to the disabled jetway list. I re-enabled it and then disabled it, and now when I went into MSFS, the jetway worked okay, but no catering trucks, UHD containers, or even the pushback vehicle were visible. I've tried disabling CYYZ in the airport services list, this didn't resolve anything.