I created an M2TS file from a project, closed the project, closed the file after viewing, shut down the computer and went to bed. Today I start up PD and am building a DVD iso file unrelated to that project, it's from a completely different project. I try to move the M2TS file off to an external drive but I can't because PD has it locked. It will also lock files in the folder that I use to import files from but the files aren't imported. It seems to be locking files and folders that have ever had anything to do with a project if PD is open.