[ddouglass]

Good explanation.
Just so you can understand this a bit more, the KMA designation (extension) is all songs imported into Hoster. The right hand column you see tells you how what format the files are actually in.
CDCDG - means it was imported directly from a disc.
HDMP3 - would an MP3+G that was imported from the Hard Drive
HDZIP - would be a zipped MP3+G, WMA+G, or WAV+G imported from the Hard Drive.
HDBIN - would be a BIN file imported from Hard Drive.
And there are more but that is enough to let you understand what that column means.
The zip files are the hardest for Hoster to work with for several reasons. There are so many zip formats that MTU has a hard time including them all. The more compressed they are the longer it takes for Hoster to unzip, store in temporary files and finally play them. This is not part of your problem but just FYI. I personally will not use zipped files in Hoster. The savings on space over the unzipped formats is so minimal that it isn't worth it. I unzip or actually convert them all with Songverter and then import.
Your black screen you see in 3.4 is the SND. If you want to use it then drag it to the TV and resize it or double click on it to make it full screen. Same as 3.321 SND. If you don't then turn it off with the Tools command for it.