The FXs are Cakewalk Studioverb2 and Sonitus:fx Reverb.
I believe it has happened every time (at least 3 or 4 times) I have done a lot of testing of the reverb presets. I don't know how long it takes since I haven't really done controlled testing.
By crash I mean I get the windows box that says something like "Sonar has experienced an error and will now exit - want to send info to Microsoft?". I don't send info. After dismissing the Windows error message Sonar says something about a proper shutdown hasn't happened and do I want Sonar to try and save stuff. I don't since I'm just testing. Then Sonar is gone.
Here's some entries from the Windows Event Log:
Faulting application sonarstd.exe, version 18.0.5.534, faulting module sonarstd.exe, version 18.0.5.534, fault address 0x0031c28f.
and
Faulting application sonarstd.exe, version 18.0.5.534, faulting module unknown, version 0.0.0.0, fault address 0x0c5d0508.
and
Faulting application sonarstd.exe, version 18.0.5.534, faulting module sonarstd.exe, version 18.0.5.534, fault address 0x0031c28f.
and
Faulting application sonarstd.exe, version 18.0.0.185, faulting module sonarstd.exe, version 18.0.0.185, fault address 0x007efcfc.
--Larry