30
The problem here is caused by the tie. You can't properly mute the tied-into note, because that will suppress its note-off, and you get a hanging note. (I am not certain why you muted the tied-from note; I would think you want that to sound.)
The easy solution for this would be to insert a hidden (but not muted) grace note of the same pitch between the whole and quarter notes, and mute the starting note of the glissando, but not the whole note:
!NoteWorthyComposerClip(2.751,Single)
|Instrument|Name:"Alto Sax"|Patch:65|Trans:0|DynVel:10,30,45,60,75,92,108,127|Pos:8|Wide:Y
|Note|Dur:Whole|Pos:4^
|Note|Dur:8th,Grace|Pos:4|Visibility:Never
|Note|Dur:4th|Pos:4|Opts:Muted
|User|Glissando.ms|Pos:-4|Playback:Chromatic
|Note|Dur:4th|Pos:-4
!NoteWorthyComposerClip-End
To me, this sounds correct.