Trouble with a Team Project File

Hello, I have a following problem. I checked out a team file and I don’t know how (must have done something wrong), but I’ve got a status with a crossed out blue dot. Now the file is completely locked and none of us can work with it. What can we do to unlock the file?
Thank you.

This thread might help you. If not, send an email to support@axure.com with your locked file attached.

Thanks, i have solved the problem in the meantime