Don't know what happened. All of a sudden, NONE of my plugins are working. The last thing that I did (before I took a break) was update to the latest version of Vegas Pro 9. ( 9.0e, build 1147)
Got back to the computer after several days and started to work on some vacation shots. got into the Brightness and Contrast plugin to adjust some stuff, looked at the "video preview" window and thought: "that's strange...... I don't see any changes". Went ahead and rendered a short clip and nothing was adjusted. Grabbed another clip and did a radical secondary color correction ..... Still no changes in the preview window and no changes in the rendered clip. I am at a loss. I would prefer not re-installing but will if I have to. Any help out there?
Thanks
Tracy

Make sure the "Split Screen View" icon isn't enabled.
It's the dual-shaded circle on the near top left of the Preview monitor.

Thanks so much! I think that is the most recent "D'OH!!" moment I've had. Annapolis thanks Windsor!!

Windsor says "You're welcome Annapolis!!!".
And don't worry as we all have D'OH moments :-)