frozen "stop/resume" button

[Former user]

When pressing stop during a clustering, sometimes the "resume" button does not get back to active status and remains disabled .. race condition of threads?

[Klaus Kopec]

to add to the bug description: this (or s.th. unrelated but identical in outcome) also sometimes (rarely) happens when switching from 3D to 2D clustering

[Tancred Frickey]

should be resolved in the latest update. Swapped the "thread.stop" and "button.setEnabled(false)" order. Now the button first gets disabled BEFORE the thread tries to re-enable it. This should avoid the race condition of the main thread and the start/stop thread trying to access the button concurrently.