Action PropertySet Assign Properties is broken

When adding (or trying to edit) an Action of type PropertySet Assign Properties, a madExcept dialog will appear and I cannot get into the edit dialog at all.

Steps to reproduce:

1: New FinalBuilder Project
2: Search Action "PropertySet Assign Properties"
3: Select Action
-> Error Message will appear: Error reading NxCheckBoxColumn1.OnChange: Invalid property value.

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finalBuilder-bugreport.txt

This was fixed in 8.0.0.1432 which is available on the downloads page.