Crash on quit

I'm getting frequent crashes when I quit the app (4.4.8). The forum will not allow me to paste in the entire log, so here is what I hope are the relevant portions...

-dan

===Process: BaseCamp [39731]
Path: /Applications/Garmin BaseCamp.app/Contents/MacOS/BaseCamp
Identifier: com.garmin.BaseCamp
Version: 4.4.8 (4.4.8)
Code Type: X86 (Native)
Parent Process: launchd [204]
Responsible: BaseCamp [39731]
User ID: 502

Date/Time: 2015-07-01 08:34:13.439 -0400
OS Version: Mac OS X 10.9.5 (13F1077)
Report Version: 11
Anonymous UUID: 362F3DFD-77DA-251E-D90C-ECC11E249EE5

Sleep/Wake UUID: C0C423ED-49C4-4D5A-861A-21345B9A717C

Crashed Thread: 9

Exception Type: EXC_BAD_ACCESS (SIGBUS)
Exception Codes: KERN_PROTECTION_FAILURE at 0x00000000a1035dc0

VM Regions Near 0xa1035dc0:
__DATA 00000000a100d000-00000000a102c000 [ 124K] rw-/rwx SM=COW /System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation
--> __OBJC 00000000a102c000-00000000a1038000 [ 48K] rw-/rwx SM=COW /System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation
__DATA 00000000a1038000-00000000a103e000 [ 24K] rw-/rwx SM=COW /System/Library/Frameworks/OpenCL.framework/Versions/A/OpenCL

Application Specific Information:
Time: 8:33 AM
Web app
Resident Memory: 3296MB, Virtual Memory: 2032MB
Current Map: City Navigator North America NT 2015.4
Locale: en
Activity: Switching to City Navigator North America NT 2015.4

Performing @selector(terminate:) from sender NSMenuItem 0x79ed3870

...

Thread 9 Crashed:
0 ??? 0xa1035dc0 0 + 2701352384
1 com.apple.CoreFoundation 0x946159d9 __CFStringDeallocate + 105
2 com.apple.CoreFoundation 0x9461309a CFRelease + 986
3 libobjc.A.dylib 0x94854497 (anonymous namespace)::AutoreleasePoolPage::pop(void*) + 527
4 com.apple.CoreFoundation 0x9463491f _CFAutoreleasePoolPop + 47
5 com.apple.Foundation 0x9216bf0f -[NSAutoreleasePool release] + 125
6 com.garmin.BaseCamp 0x00d891db +[THR_ThreadWrapper Start:] + 221
7 com.apple.Foundation 0x921b816e -[NSThread main] + 45
8 com.apple.Foundation 0x921b80c6 __NSThread__main__ + 1426
9 libsystem_pthread.dylib 0x99c465fb _pthread_body + 144
10 libsystem_pthread.dylib 0x99c46485 _pthread_start + 130
11 libsystem_pthread.dylib 0x99c4bcf2 thread_start + 34

...


Thread 9 crashed with X86 Thread State (32-bit):
eax: 0xa1035dc0 ebx: 0x94612c00 ecx: 0xa1034ce4 edx: 0xa102e18c
edi: 0xa10351c4 esi: 0xa10289b0 ebp: 0xb0535a18 esp: 0xb05359fc
ss: 0x00000023 efl: 0x00010286 eip: 0xa1035dc0 cs: 0x0000001b
ds: 0x00000023 es: 0x00000023 fs: 0x00000023 gs: 0x0000000f
cr2: 0xa1035dc0

Logical CPU: 2
Error Code: 0x00000015
Trap Number: 14


...

External Modification Summary:
Calls made by other processes targeting this process:
task_for_pid: 1
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: 212575
thread_create: 1676
thread_set_state: 0

VM Region Summary:
ReadOnly portion of Libraries: Total=248.5M resident=67.1M(27%) swapped_out_or_unallocated=181.4M(73%)
Writable regions: Total=327.8M written=188.1M(57%) resident=241.0M(74%) swapped_out=15.9M(5%) unallocated=86.8M(26%)

REGION TYPE VIRTUAL
=========== =======
CG backing stores 13.8M
CG image 908K
CG raster data 2388K
CG shared images 212K
CoreAnimation 8892K
Foundation 4K
IOKit 7528K
IOKit (reserved) 256K reserved VM address space (unallocated)
Image IO 232K
JS VM register file (reserved) 4096K reserved VM address space (unallocated)
JS garbage collector 256K
Kernel Alloc Once 4K
MALLOC 256.4M
MALLOC (admin) 48K
MALLOC_LARGE (reserved) 1024K reserved VM address space (unallocated)
Memory Tag 242 12K
OpenCL 40K
OpenGL GLSL 1280K
SQLite page cache 256K
Stack 76.3M
VM_ALLOCATE 17.2M
WebKit Malloc 1248K
__DATA 18.2M
__IMAGE 528K
__LINKEDIT 55.8M
__OBJC 4240K
__PAGEZERO 4K
__TEXT 192.7M
__UNICODE 544K
mapped file 94.8M
shared memory 68K
=========== =======
TOTAL 758.5M
TOTAL, minus reserved VM space 753.3M


Model: iMac11,2, BootROM IM112.0057.B01, 2 processors, Intel Core i3, 3.2 GHz, 4 GB, SMC 1.64f5
Graphics: ATI Radeon HD 5670, ATI Radeon HD 5670, PCIe, 512 MB
Memory Module: BANK 0/DIMM1, 2 GB, DDR3, 1333 MHz, 0x80AD, 0x484D54313235533654465238432D48392020
Memory Module: BANK 1/DIMM1, 2 GB, DDR3, 1333 MHz, 0x80AD, 0x484D54313235533654465238432D48392020
AirPort: spairport_wireless_card_type_airport_extreme (0x168C, 0x8F), Atheros 9280: 4.0.74.0-P2P
Bluetooth: Version 4.2.7f4 15112, 3 services, 23 devices, 1 incoming serial ports
Network Service: Ethernet, Ethernet, en0
Serial ATA Device: WDC WD1001FALS-40Y6A0, 1 TB
Serial ATA Device: OPTIARC DVD RW AD-5680H
USB Device: Hub
USB Device: UPS
USB Device: Macally USB Keyboard
USB Device: Internal Memory Card Reader
USB Device: BRCM2046 Hub
USB Device: Bluetooth USB Host Controller
USB Device: Hub
USB Device: USB2.0 Hub Controller
USB Device: IR Receiver
USB Device: Built-in iSight
FireWire Device: My Book 1112, WD, Up to 800 Mb/sec
Thunderbolt Bus: