When I added a \ myself in any path it didn't work (I think also black screen). Hope you can fix it because i am very happy with Sofarun. I love the last edition where you can add your own extensions and attach programs. Great job till now.
Suggestion for a future feauture: Maybe multiple file selection so you can for example play several .MID files in a row. Multimente has that option and I think it creates a sort of batch file to call the program with each file name.
