Ozpeter offers this great solution:
Pending a fix or advice from Adobe, I've written a tiny program to help with problems of Premiere Elements 8 not shutting down properly.
"PE8 Runner" is a small utility which...
- Asks you whether you want to run Premiere Elements 8.0 with or without the welcome screen
- Checks after you close the program whether it really has closed, or whether its process is still running
- Asks you whether you want to terminate the unclosed process (so you don't have to use Windows Task Manager to do it).
INSTALLATION
None. You can run PE8 Runner.exe from anywhere on your PC. But it assumes you have Premiere Elements installed
in the default location (C:\Program Files\Adobe\Adobe Premiere Elements 8.0)
USE
Run PE8 Runner.
Answer yes or no to the question about using the welcome screen.
(If you choose not to use the welcome screen you will go straight to the program
and then you must open or create a project using the normal menu).
Use Premiere Elements 8 as normal.
After you close Premiere Elements 8, about 10 or 20 seconds afterwards
you may see a window pop up telling you that the Premiere Elements process
is still running (and using your PC's resources), and asking you if you want
to terminate the process.
Unless you are in fact still using the program, answer "yes".
LIABILITY
The author (me) has developed and tested the program on a virus-protected system
using Windows XP SP3. Every precaution has been taken to ensure that
it is reliable, but it's up to you to choose whether to use it or not, and the author
accepts no responsibility for the outcome.
Please test it on an unimportant project before using it on something real.
I have not been able to test it on other versions of Windows and would be interested in any reports.
Download link http://www.fileden.com/files/2007/9/22/1451533/PE8%20Runner.zip - it's a small download. Source code is included.