I noted that X2 was crashing a lot when I try to Delete or Undo plug in insertion. Sonar likes to crash a lot for any giver reason- you should not take it personally. Just restart and see if it happens again. Do not undo anything, specially do not delete inserted plug ins.
Sending report to Cakewalk does not mean they will ever reply even if you check the box. I did it on many occasions and nobody ever contacted me.