What operating system are you using?
On a windows system you should be able to press and hold the Shift+Ctrl keys just after starting the launch of the pse 12 editor.
(on a mac Command+Shift)
Keep holding the keys down until you get a dialog where you can set the additional plugins folder and then press Cancel ,which should allow pse 12 to open without loading the additional plugins you had pointed to earlier.
Then you can go to the pse 12 preferences and uncheck the additional plugins.
What plugin were you tying to use with pse 12
(sounds like an older plugin, since it's calling for the MSVCRT10.dll)