Marcel Taeumel uploaded a new version of SUnitGUI to project The Trunk:
http://source.squeak.org/trunk/SUnitGUI-mt.76.mcz

==================== Summary ====================

Name: SUnitGUI-mt.76
Author: mt
Time: 30 September 2019, 11:12:00.84171 am
UUID: e740e7cc-b7e0-374b-a7ad-1a06e32fa176
Ancestors: SUnitGUI-mt.75

Fix oversight from last commit. Sorry for the noise.

=============== Diff against SUnitGUI-mt.75 ===============

Item was changed:
  ----- Method: TestRunner>>categorySelected (in category 'accessing-categories') -----
  categorySelected
+ 	^ categoryIndex ifNil: [0]!
- 	^ categoryIndex!