I would like to add to this thread, in the hope this may help someone else.
Converting the files did allow Videobox to scan a little faster, but didnt help the overall speed of videobox.
I had a powercut yesterday which knocked out my jukebox. When I rebooted VideoBox informed me that no license was found. After uninstalling and re-installing there was still no success. I copied the error code to a text document and followed the folderpath (through hidden folders) to the correct file, deleted the parent folder and reinstalled.
Had to change a few settings to put it how I wanted but magically its made the whole thing go as fast as lightening! All works hunky dory.
I must have changed a setting or something that put something in an infinate loop? Its the only thing I can think of?
Matt