@Thematic
Works fine here.
Did you quit TuneNet before updating the plugin and restart after or perform a reboot after installing? Also do you have a working xpkmaster.library installstion (either OS4 native or m68k with .l.main file) cause if you don't the plugin doesn't bother to check for XPK files and just passes them to UADE which gives the message "The file is SQSH packed. Please depack first.".
BTW don't bother with uade123 because it doesn't have XPK/XFD support.
Quote:
other XPK files apparently return an empty file or so, because TuneNet shows in the GUI "Opening file", then "Playback finished".
Edit: definitely sounds like a broken xpkmaster.library installation. Can you check what version the file is ("version full libs:xpkmaster.library", minimum version is 5.x) and if it's m68k or PPC (the m68k version needs a .l.main glue file that you can get from OS4Depot)?