Profiler were freezed while deleting profiles from rig manager, hang or something?
How many are you deleting? It takes time to delete multiple rigs at once.
I do these two steps when deleting one or more profiles at a time with RM:
1. Make sure you are not loaded on a profile that will get deleted. No "headphone icon" on it.
2. I don't play guitar or touch anything until the delete process is completed.