Problem getting swf files to play

I have not used my Articulate Presenter 9 for several years. It was always a bit shaky and I wondered if it was going to work. PP hated it and complained continually and occasionally would kick it out of PP.  When I fired it up again PP wanted nothing to do with it. I contacted Articulate and was told there is another version available. I have look for updates but did not find any so this was welcome. It appeared to work quite well but when I went to play the files nothing happened, just a blank screen. I checked on my old files and they would send the loading bar about one-third the way and hang-up. The encoded files appear not to work anymore. Help