Hey Claude

Did you put the files in the proper folder after you downloaded them?
I have my sound in ..\progression 3\sounds
Hope this helps you a little on your way

Ch33rs
Saga

Yea, if you're in Windows.

Pregression click path: File > Preferences > Audio Tab .. towards the bottom.

Set the location for installed Sounds. This can be set to anyplace on the system.. different drive etc..
Put all you Sound stuff there.

Here's a the URL to a better post on the subject.
https://forums.presonus.com/viewtopic.php?f=172&t=1739
viewtopic.php?f=172&t=1739

Hi.
I've downloaded the file "Classical Guitar Expansion.prox" and copied it into the folder "...\PreSonus\Progression 3\Sounds\Bundled" or in the Folder "...\PreSonus\Progression 3\Sounds".
I open Progression, create a noew song with a staff for guitar and changed the instrument from "e-guitar" to "classical guitar" and entered some notes. There is nothing to hear when I press Play. If I changed the iinstrument back to "e-guitar" and play the song, there is an output.

.. and here is the solution I find in this forum:
This is very buggy and you have to mention this issue on your download site and/or in an readme-file.

The Settings under preferences-audio have to locate on drive C and not in the Installation drive which is in my case drive D and you have to change the settings to
"C:\Program Files\Progression 3\Sounds".

Presently a keyboard plays the electric guitar part when I hit play. The electric guitar file is in the sounds\bundled subdirectory along with the other instruments and I point to that directory in the file>preferences>audio> samples directory box. Why doesn't the electric guitar sound when I hit play?

Try to dobleklick the *.prox file. Then it starts to install.