I was trying to edit the plist in the App Store so it wouldn't show a badge alert. It was a success, but I didn't know I needed the copy, so I deleted it the original. Now, it won't work at all. This is what it says when I try to open the App Store. "Process: App Store  Path: /Applications/App Store.app/Contents/MacOS/App Store Identifier: com.apple.appstore Version: ??? Build Info: Commerce-355000000000000~4 Code Type: X86-64 (Native) Parent Process: ???  Responsible: App Store  User ID: 502 Date/Time: 2014-07-23 10:03:30.296 -0500 OS Version: Mac OS X 10.10 (14A283o) Report Version: 11 Anonymous UUID: B9817145-7D84-A4FA-F5EF-F4339A51EF58 Time Awake Since Boot: 670 seconds Crashed Thread: 0 Exception Type: EXC_CRASH (Code Signature Invalid) Exception Codes: 0x0000000000000000, 0x0000000000000000 kernel messages: VM Regions Near 0x7fff7537b0a8 (cr2): __LINKEDIT 00007fff675d4000-00007fff675e8000 [ 80K] r--/rwx SM=COW /usr/lib/dyld --> Submap 00007fff70000000-00007fff80000000 [256.0M] r--/rwx SM=PRV process-only VM submap unused shlib __DATA 00007fff736d9000-00007fff75c24000 [ 37.3M] rw-/rw- SM=COW system shared lib __DATA not used by this process Thread 0 Crashed: 0 dyld 0x00007fff67565000 _dyld_start + 0 Thread 0 crashed with X86 Thread State (64-bit): rax: 0x000000000000000d rbx: 0x0000000000000000 rcx: 0x0000000000000000 rdx: 0x0000000000000000 rdi: 0x0000000000000000 rsi: 0x0000000000000000 rbp: 0x0000000000000000 rsp: 0x00007fff5015ab48 r8: 0x0000000000000000 r9: 0x0000000000000000 r10: 0x0000000000000000 r11: 0x0000000000000000 r12: 0x0000000000000000 r13: 0x0000000000000000 r14: 0x0000000000000000 r15: 0x0000000000000000 rip: 0x00007fff67565000 rfl: 0x0000000000000201 cr2: 0x00007fff7537b0a8 Logical CPU: 0 Error Code: 0x020000f4 Trap Number: 133 Binary Images: 0x7fff67564000 - 0x7fff6759a67f dyld (???) <D8593292-21DF-3B34-97D1-C9CBEA96E193> /usr/lib/dyld External Modification Summary: Calls made by other processes targeting this process: task_for_pid: 0 thread_create: 0 thread_set_state: 0 Calls made by this process: task_for_pid: 0 thread_create: 0 thread_set_state: 0 Calls made by all processes on this machine: task_for_pid: 417 thread_create: 0 thread_set_state: 0 VM Region Summary: ReadOnly portion of Libraries: Total=300K resident=296K(99%) swapped_out_or_unallocated=4K(1%) Writable regions: Total=8416K written=0K(0%) resident=12K(0%) swapped_out=0K(0%) unallocated=8404K(100%) REGION TYPE VIRTUAL =========== ======= STACK GUARD 56.0M Stack 8192K VM_ALLOCATE 8K VM_ALLOCATE (reserved) 4K reserved VM address space (unallocated) __DATA 228K __LINKEDIT 80K __TEXT 220K mapped file 40K shared memory 4K =========== ======= TOTAL 64.6M TOTAL, minus reserved VM space 64.6M" Any help is appreciated, I can't update to DP4 because it won't open.