"dolphin.exe has stopped working" - did work before

[xavlll]

hey, still searching the internet for a solution i finally found some advice that solved the problem (more or less).
i created another admin account in my current windows7 installation and when i use that account dolphin works perfect.
on this 2 years old account i am using now it still crashes. so i think my registry is messed up..
i am fine with that "solution" now but if you know how to fix my old account i would appreciate it if you tell me