I didn't include the six xP
You do have the latest version of each. I do, and they work. So it might be a problem with overtaxing the ram on your comp (just a guess) or something unrelated to the plugin is your issue ( a corrupt brush, for example). Hopefully someone a little more tech savvy can help. If worse comes to worse, you can uninstall the program, delete all plugins, and start over, and see if you have the same problem. (make sure to get rid of all old plugins, sometimes they linger after installing new ones).
I think I'll use that as a last resort..
Ok..
I didn't understand exactly what you said, so I tried my own 'experiment'.
It seems, that 14 brushes is my limit..
If I have 15+ brushes in my folder, the Custom Brushes plugin crashes.
There is also a folder called "Language" in my Custom Brushes folder..
Is that normal?