I just tried to prepare some footage for a lesson i'm giving and naturally I updated Tracker to v6.0.6 when it asked to do that.

I haven't used Tracker in a while so I don't know if the update is the problem or if it was a Mac OS Update in the past.

So the situation is, that Tracker doesn't open any files I know to have worked about a year ago. I could supply videos and trk-files that worked a year ago, but do not do so now.

There is no specific error that could help me fix the issue.

Are there any things I could do to find the issue and fix it? I'd really love to keep using tracker in class.