Problem has only developed as I'd added a bunch of new CDLC only 3 days ago without issue. Launch CFSM after adding new CDLC to the folder and it hangs while parsing the new track, cancelling hangs also. Doesn't seem to be a particular CDLC as I've tested with different numbers and combinations of new tracks as well as by themselves. Did another test where I removed one of the songs I added 3 days ago(and had played and confirmed working) and launched CFSM without issue and then a