Thanks, Kirk - for the quick reply and the reg key. (For myself, regedit's just fine).
Also further info -
1. Rebooted my machine, and then got PM to complete the launch (that's been the only working trick for a while now)
2. Moved the cache location to a new folder as a way to attempt force-flush the cache in case it was part of the problem. Got an error dialog from PM that either the source or dest was not available; makes no sense since both source and dest folders exist w/o issue.
3. Relaunched PM, and checked prefs. Clear cache upon exit was still checked (as it always has been).
4. Also, changed prefs so that PM no longer attempts to reopen the last folder visited, as a way to speed the launch up.
5. For the moment, PM is launching OK now... If it starts to have launch problems after the machine's been running after reboot for a while, will let you know.
Thanks,
j