Just updated from 17.1.2 to 17.1.3, and I have noticed what seems to be a bug in the user interface. Trigger buttons and a few other things seem to have disappeared. They can still be selected and the hint text still appears when you hover the cursor, but the actual button icon is gone.
I have restarted my system and flexsim several times, so I don't think it is an issue with my machine. If anyone else is experiencing it or has a fix, it would be appreciated.