I have two challenges that cannot be deleted
their ids are:
4579334
4578773
they are from BlueBreaker to BlueBreaker
It looks like when you delete a challenge it is removed from the server but it still exists in your downloaded challenges.
You could try renaming the file My Documents\My Games\GratuitousSpaceBattles\web\challenges\challengelist.txt and then restarting GSB. I think it will disappear then.
This is true. | also think this was fixed in 1.36, as I recall.
That did the job follick, I was already using 1.36 now it doesn’t seem to happen anymore.