On a couple of different PCs that I've used MAX/MSP on recently, the DSP options in the Options menu seems to become either blanked-out or won't open. After happening at work a couple of times, it has now happened just at the wrong time on my workstation at home too. Any fixes?

I've tried repairing, reinstalling MAX/MSP and even deleting all the folders that the program uses, but with no improvement...

I'm using 4.5.6 as I can't get 4.5.7 to work on my machines.

My systems: Acer 5620 laptop Intel Core Duo T2300, 1GB RAM Win XP Home Emu 1616M soundcard MAX/MSP 4.5.6 / Pluggo / Hipno + Pentium 4C 2.8 desktop, 1GB RAM Asus P4P800 Deluxe m/b Win XP Pro, RME HDSP soundcard