Finder quit Unexpectedly after changing Info.plist

I was trying to remove Finder from application switcher using instructions here but the Finder is now crashing. I changed the file back and restarted but still nothing. Here's the error report:

Process:               Finder [697]
Path:                  /System/Library/CoreServices/http://ift.tt/1jmRxnn
Identifier:            Finder
Version:               ???
Code Type:             X86-64 (Native)
Parent Process:        ??? [1]
Responsible:           Finder [697]
User ID:               501

Date/Time:             2015-01-25 21:35:39.288 +0530
OS Version:            Mac OS X 10.10 (14A389)
Report Version:        11
Anonymous UUID:        0C7EA3EB-C1AA-DC16-0059-810608BAA746


Time Awake Since Boot: 360 seconds

Crashed Thread:        0

Exception Type:        EXC_CRASH (Code Signature Invalid)
Exception Codes:       0x0000000000000000, 0x0000000000000000

kernel messages:

VM Regions Near 0x7fff7a85e0a8 (cr2):
    __LINKEDIT             00007fff6aa13000-00007fff6aa27000 [   80K] r--/rwx SM=COW  /usr/lib/dyld
--> Submap                 00007fff70000000-00007fff80000000 [256.0M] r--/rwx SM=PRV  process-only VM submap
    unused shlib __DATA    00007fff78389000-00007fff7a918000 [ 37.6M] rw-/rw- SM=COW  system shared lib __DATA not used by this process

Thread 0 Crashed:
0   dyld                            0x00007fff6a9a4000 _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: 0x00007fff56a83d08
   r8: 0x0000000000000000   r9: 0x0000000000000000  r10: 0x0000000000000000  r11: 0x0000000000000000
  r12: 0x0000000000000000  r13: 0x0000000000000000  r14: 0x0000000000000000  r15: 0x0000000000000000
  rip: 0x00007fff6a9a4000  rfl: 0x0000000000000201  cr2: 0x00007fff7a85e0a8

Logical CPU:     0
Error Code:      0x020000f4
Trap Number:     133


Binary Images:
    0x7fff6a9a3000 -     0x7fff6a9d9837  dyld (???) <4696A982-1500-34EC-9777-1EF7A03E2659> /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: 227
    thread_create: 0
    thread_set_state: 0

VM Region Summary:
ReadOnly portion of Libraries: Total=300K resident=224K(75%) swapped_out_or_unallocated=76K(25%)
Writable regions: Total=8468K written=0K(0%) resident=12K(0%) swapped_out=0K(0%) unallocated=8456K(100%)

REGION TYPE                      VIRTUAL
===========                      =======
STACK GUARD                        56.0M
Stack                              8192K
VM_ALLOCATE                           8K
VM_ALLOCATE (reserved)               56K        reserved VM address space (unallocated)
__DATA                              228K
__LINKEDIT                           80K
__TEXT                              220K
mapped file                        6324K
shared memory                         4K
===========                      =======
TOTAL                              70.8M
TOTAL, minus reserved VM space     70.7M


Model: MacBookPro9,2, BootROM MBP91.00D3.B09, 2 processors, Intel Core i5, 2.5 GHz, 4 GB, SMC 2.2f44
Graphics: Intel HD Graphics 4000, Intel HD Graphics 4000, Built-In
Memory Module: BANK 0/DIMM0, 2 GB, DDR3, 1600 MHz, 0x80AD, 0x484D54343235533641465236412D50422020
Memory Module: BANK 1/DIMM0, 2 GB, DDR3, 1600 MHz, 0x80AD, 0x484D54343235533641465236412D50422020
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0xF5), Broadcom BCM43xx 1.0 (7.15.124.12.8)
Bluetooth: Version 4.3.0f10 14890, 3 services, 19 devices, 1 incoming serial ports
Network Service: Wi-Fi, AirPort, en1
Serial ATA Device: APPLE HDD HTS545050A7E362, 500.11 GB
Serial ATA Device: HL-DT-ST DVDRW  GS41N
USB Device: Hub
USB Device: Hub
USB Device: BRCM20702 Hub
USB Device: Bluetooth USB Host Controller
USB Device: Apple Internal Keyboard / Trackpad
USB Device: IR Receiver
USB Device: Hub
USB Device: FaceTime HD Camera (Built-in)
Thunderbolt Bus: MacBook Pro, Apple Inc., 25.1