I just did it and it was fine. How are you breaking it?
In many ways.
1. We cannot use Simcloth as we have since it was first introduced to A:M.
2. A:M Crashes upon initiating Simcloth simulation (Using Harun's project as well as projects created from scratch)
3. There are two options (In Chor) to Simcloth Simulate (one relates an error while the other crashes A:M...) I've seen it crash with both options as well.
Added: I just read through some of the simcloth related changes in v19 changelog and some things reported as fixed do not appear to have remained fixed.
For instance, the Boo project you used to demonstrate that a v18 Simcloth project crashed in v19 still crashes in v19e.
A good test would be to open an older project that is known to work and see if it still works in v19e. (Edit: Done, see next post)
If the old Simcloth methodology has been replaced we definitely need to get the word out but attempting the old Simcloth shouldn't crash A:M.