Serviio

I have a iMac 27" 3,1 GHz Intel Core i5 with OS X Yosemite 10.10.2. Internet through ethernet to TV and wifi to computer and Serviio 1.5.2. Skip through have sometimes been a problem for some files, but now it's gone for all files and the return function is also gone. So if serviio is somehow disconnected the only way to se the rest of the film is to play it all over from start. And it seems to bee like this with all files, not just mkv.

Any clues?