No third party plug-ins, and no I didn't delete the /cs files.
I back up using time machine.
This is the latest crash report:
Process: Logic Pro [251]
Path: /Applications/Logic Pro.app/Contents/MacOS/Logic Pro
Identifier: com.apple.logic.pro
Version: 9.1.8 (1700.67)
Build Info: Logic-17006700~1
Code Type: X86 (Native)
Parent Process: launchd [152]
Date/Time: 2013-05-01 22:29:51.201 +0100
OS Version: Mac OS X 10.7.5 (11G63)
Report Version: 9
Crashed Thread: 0
Exception Type: EXC_BREAKPOINT (SIGTRAP)
Exception Codes: 0x0000000000000002, 0x0000000000000000
Application Specific Information:
dyld: launch, loading dependent libraries
Dyld Error Message:
Library not loaded: /System/Library/PrivateFrameworks/ProKit.framework/Versions/A/ProKit
Referenced from: /Applications/Logic Pro.app/Contents/MacOS/Logic Pro
Reason: image not found
Binary Images:
0x1000 - 0xbeafff com.apple.logic.pro (9.1.8 - 1700.67) <94981650-518B-2288-F07D-F28F27103100> /Applications/Logic Pro.app/Contents/MacOS/Logic Pro
0xe84000 - 0xea2fef com.apple.XSKey (1.0.0 - 52) <71B94F53-15DB-9012-91F2-211F7C2CD790> /Library/Frameworks/XSKey.framework/Versions/A/XSKey
0xeb1000 - 0xee4fe7 com.apple.music.apps.MAAudioUnitSupport (9.1.8 - 233.53) <E8A99468-7726-CCFE-8D26-DDBC9D5E1AC3> /Applications/Logic Pro.app/Contents/Frameworks/MAAudioUnitSupport.framework/Versions/A/MAAudioUnit Support
0xef1000 - 0xf22ff3 com.apple.musicaudiodataservices (1.1 - 251.4) <0265F317-13AB-6CF1-A171-7D5853442E75> /Applications/Logic Pro.app/Contents/Frameworks/MAAssetSharing.framework/Versions/A/MAAssetSharing
0xf31000 - 0xf33fff com.apple.ExceptionHandling (1.5 - 10) <7C514CC4-7951-31CA-AEB3-D4AF49F44AE7> /System/Library/Frameworks/ExceptionHandling.framework/Versions/A/ExceptionHand ling
0xf39000 - 0xf97ff3 com.apple.music.apps.MALoopManagement (9.1.8 - 219.66) <0075F2D0-7A48-A362-2D49-4FECA5E9DF8E> /Applications/Logic Pro.app/Contents/Frameworks/MALoopManagement.framework/Versions/A/MALoopManagem ent
0x8fe41000 - 0x8fe73aa7 dyld (195.6 - ???) <3A866A34-4CDD-35A4-B26E-F145B05F3644> /usr/lib/dyld
0x91715000 - 0x919c7ff7 com.apple.AddressBook.framework (6.1.3 - 1091) <B8CC707C-6368-3CDD-BE38-D2335B7CC2DE> /System/Library/Frameworks/AddressBook.framework/Versions/A/AddressBook
0x93efc000 - 0x93f0afff libz.1.dylib (1.2.5 - compatibility 1.0.0) <E73A4025-835C-3F73-9853-B08606E892DB> /usr/lib/libz.1.dylib
0x94942000 - 0x94a23ff7 com.apple.DiscRecording (6.0.4 - 6040.4.1) <08BADDAD-FA79-3872-9387-EEE2A9FAA2F0> /System/Library/Frameworks/DiscRecording.framework/Versions/A/DiscRecording
0x95de5000 - 0x95e49fff com.apple.framework.IOKit (2.0 - ???) <94827954-5906-36C4-819B-24CDAFD85C72> /System/Library/Frameworks/IOKit.framework/Versions/A/IOKit
0x96c87000 - 0x96dddfff com.apple.audio.toolbox.AudioToolbox (1.7.3 - 1.7.3) <F09C7075-2C4E-3A4F-A372-95D700125513> /System/Library/Frameworks/AudioToolbox.framework/Versions/A/AudioToolbox
0x97e57000 - 0x980dcfe3 com.apple.QuickTime (7.7.1 - 2340) <76E45D49-3D4F-32AB-A411-E52C22FA24C8> /System/Library/Frameworks/QuickTime.framework/Versions/A/QuickTime
0x9b079000 - 0x9b079fff com.apple.Carbon (153 - 153) <63603A0C-723B-3968-B302-EBEEE6A14E97> /System/Library/Frameworks/Carbon.framework/Versions/A/Carbon
0x9b080000 - 0x9b080fff com.apple.audio.units.AudioUnit (1.7.3 - 1.7.3) <2E71E880-25D1-3210-8D26-21EC47ED810C> /System/Library/Frameworks/AudioUnit.framework/Versions/A/AudioUnit
0x9b233000 - 0x9b23bfff com.apple.DiskArbitration (2.4.1 - 2.4.1) <28D5D8B5-14E8-3DA1-9085-B9BC96835ACF> /System/Library/Frameworks/DiskArbitration.framework/Versions/A/DiskArbitration
0x9b488000 - 0x9b65ffe7 com.apple.CoreFoundation (6.7.2 - 635.21) <4D1D2BAF-1332-32DF-A81B-7E79D4F0A6CB> /System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation
0x9c98c000 - 0x9c9edffb com.apple.audio.CoreAudio (4.0.3 - 4.0.3) <7A14BE52-6789-3CE3-9AE9-B733F4903EB1> /System/Library/Frameworks/CoreAudio.framework/Versions/A/CoreAudio