Solved I cannt delete media files from my Library..

I got some media files I converted and I most of the originals I was able to delete rright away, but there are some that I ca not delete.. I converted them to the MKV format to save space on my HD so far 50 gigs saved...I use MKV Player for my video and Winamp for my audio.. I had it to single click to open files, but found I was opening movies in to winamp instead(audio no video).. I am thinking these files are stuck in a queue somewhere on winamp or MKVPlayer somoewhere and I dont know how to reset queues...

Also I tried using default to setup video as KMV player but it reverts back to winamp all the time..is there a permanant way to set this to my video player....???

The Audio files are fine the way they are....