Finale 27.4, Windows 10, Sonar, (Cubase), Dorico Pro & Dorico iPad
I had no trouble getting cello harmonics to play using Easy Harmonics (from the included TG Tools). I wrote the notes as fourths, highlighted the measures, and ran the plug-in. Hope that helps.
I found this using Windows' Character Map at code 0x96 and copied and pasted it into the expression designer.
Finale v25 is 64-bit. Finale 2014.5 is not.
Are you talking about staves or systems on a page?
In which font does ALT+0150 produce the symbol you want?
You are then, presumably, not using a Garritan KS string sound, which would allow you to switch from arco to pizz without changing layers (via HP and expressions).
You seem to be missing the Maestro music font, or else another font has somehow been selected by error in Documents > Document Options > Fonts. Most likely something interfered with your download/i...
Presumably you can click the link to Jari's web site as well as anyone else can. If there is any update, it would presumably appear there first.
Your profile info doesn't say what version of Finale or what operating system you are using. This would help us answer your question.
If you want independent dynamics on different layers, you are probably (from my experience) out of luck. If all your layers use the same instrument (on the same MIDI channel) you should be able to ...