Link to .capx file (required!):
Steps to reproduce:
1. Add Group
2. Blank name
3. Click OK
4. Edit Group
5. Type a name
6. Click OK
The name isn't registered, you can't continue..
Group is renamed
Operating system & service pack:
Construct 2 version: r152 (64-Bit)
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Oops, thanks - should be fixed in the next build.