Hello, sorry for my english but I'm using a translator.
I have a big problem with Muse, pretty much most of the time I can not open my company website. I open the file and does not load thumbnails and locks standing there without being able to do anything if you do not close it from the task manager. This often happens at times step even hours to open and close unnecessarily. A case then resumes, but I always have this problem that often comes back.
I have a screen of the problem
Do you get any error message as well along with the Muse crash?
Please try unchecking the "miniatura" option and see if still freezes!