I have followed the list of items under Stability on the Wiki with no success. I created logs and emailed them per the instructions. MC 14 works fine and plays music without a problem. When clicking on File Types in the dialog box, the system takes a few seconds to respond, then the file types dialog box is displayed and then I get the message that Windows has found a problem and must shut down MC14 and asks do I want to send info to Microsoft. The only change that was made to that machine recently was checking the box in Options - General - Enable Shell Operations. I don't remember for sure, but I believe I did that within MC14. I have disabled shell integration in MC14, but that did not correct the problem.
I have installed MC14 on another machine and I can access the File Types dialog box without a problem. Further, there is no delay when opening the File Types selection. I have shell integration enabled on this second machine.