#48 Shortcuts eventually stop working

[SnakE]

Version 5.0.2.1570
After some experimentation my class diagram in a Design Model came to a state where I cannot use any shortcut creation syntax. Whenever I use it, a message box appears:
Access violation at address 0075CEC6 in module 'StarUML.exe'. Read of address 00000020.
The problem persists if I restart StarUML and load the problematic diagram. Though shortcuts work fine in other diagrams of the same project.
I'm attaching the problematic project file.

[SnakE]

Shortcut syntax is broken in Main diagram of the Design Model