Reinstalling quicktime X

[BelgianBoy]

I had a problem with installing 5kplayer (probably malware?) Stupid me! I could get rid of it with Cleanmymac. But now Quicktime doen't work: QTX crashes and QT7 plays the sound but doesn't show the movie. Strangely enough iTunes works and iMovie also.
Any suggestions?

 

[BelgianBoy]

This is the error message:

Crashed Thread: 0

Exception Type: EXC_CRASH (SIGABRT)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Exception Note: EXC_CORPSE_NOTIFY

Termination Reason: DYLD, [0x4] Symbol missing

Application Specific Information:
dyld: launch, loading dependent libraries

Dyld Error Message:
Symbol not found: _OBJC_CLASS_$_AVTimeFormatter
Referenced from: /Volumes/VOLUME/Applications/QuickTime Player.app/Contents/MacOS/QuickTime Player
Expected in: /System/Library/Frameworks/AVKit.framework/Versions/A/AVKit
in /Volumes/VOLUME/Applications/QuickTime Player.app/Contents/MacOS/QuickTime Player

 

[BelgianBoy]

Nobody with any suggestion?