I just ran into this problem while working on a project.
 
I have TTS 1 inserted into a project with CH 1 as a warm pad and CH 2 as strings. I decided I wanted to change(audition)to a different string set on CH 2. When I right click to see the presets. NOTHING ! It will not allow me to select any instr on ANY channel.I've tried opening/closing session, rebooting inserting a 2nd TTS but get the same result there. There is audio output to what I had earlier designated that I can hear fine, I just can't create or change instruments.
 
Anyone had this problem?
 
I've rebooted and still nothing.
 
Hints: since insertion the icon in synth rack is greyed out. This happened with the new synth I tried as an experiment. Also, I had just done a FREEZE and unfreeze synth earlier in my work.
 
Thanks for any help.
~Michael~
 

Have you tried to load a different or a new project to see if this carries over or if it just affects that one project? 
 
I seem to recall in the past that I had a similar issue. Apparently the project had gotten corrupted somehow and nothing would work right.... it played but I could add or change the synths.
 
I ended up creating a new project and copied the midi tracks and audio over to the new project. Everything worked perfectly in the new project so I deleted the old broken one.  I only recall this happening one time..... don't know what caused it.

I was getting ready to try your suggestion, when I found a work around.
 
Rather than try to bring up the pre-sets by right clicking the midi channel, I click the button at the top of the channel, which brings up the edit functions, which then allowed me the ability to access the different pre-sets. Not sure why, but it worked. TTS is working normally in all other projects right now, so I guess I'm good.
 
But I think this will be the way I access the pre-sets in the future anyway. It allows for more immediate manipulation... TH

Michael
 

Hi Michael, 
Unless you have your mouse set up with reversed buttons, right-clicking does not bring up presets.  you left-click the preset name next to the volume slider.  Hope I didn't misread your post.

Good call, Arvid.  I was just going to post the same thing.
 
Bob Bone