Last night I had PMS running and was fine.
Today I had trouble getting the subtitles to work and in an attempt to fix it have been changing settings left right and center Now when I stream the file I was streaming last night it stutters like hell, totally unwatchable. I uninstalled PMS, deleted the remaining files from the program files directory then reinstalled. Seems to have remebered all the settings so I've not lost my stuttering and it's totally unwatchable.
On the upside, I did work out what the problem was with the subs