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If you went to the jailbreakme.com site, it fixes it automatically and can't fix it again...

However, that app is there for people that got installer a different way other then jailbreakme.com
 
Can't install this get "main script execution failed" how do i get this running

Ya, I was very confused when I saw this because I thought this was intended to fix all of my issues with launching apps.

Instead, it is just a quick & dirty fix to fix your device making it more "safe" rather than more stable and usable (I soon found the necessary downloads - BSD subsystem - to solve EVERY problem)
 
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