Have no idea what could be causing this, because as you say, you changed something, and now things are different. What exactly did you do? Can you put whatever it is you did, back to how it was? Failing that, the only thing I can suggest is a reinstall.
Just a side note, due to the nature of the the TBM and how it is put together, we ask people not to make any changes to any of the files. No matter how small the changes may be, the consequences could be irreversible.
If it can't be fixed, then I'm afraid your only option is a complete TBM reinstall.