I don't know what happened but the Techtool Pro 4.0x app won't load after installation. Fixed permissions after installation, turned journaling off beforehand, threw away all parts, reinstalled...nothing works. I actually got version 4.04 to open up one time, then I closed it, and it wouldn't open up again. I'm scared to boot my computer up with this thing, if I can't even open it up from the inside. I've used earlier versions for years and I counted on it for reliable computer maintenance but now, I just don't know.

Computer specs: dual 1GHz MDD G4, OS 10.3.9, 2Gb RAM, 3 internal HDs, 1 AlchemyTV pci card, GeForce4 Ti 4600 video card.