Uninstall and clean re-install does not resolve the issue.
Faulting application name: SourceTree.exe, version: 1.6.14.0, time stamp: 0x54ea9dbe
Faulting module name: KERNELBASE.dll, version: 6.1.7601.18409, time stamp: 0x5315a05a
Exception code: 0xe0434352
Fault offset: 0x000000000000940d
Faulting process id: 0xdf4
Faulting application start time: 0x01d055d7b25dcbf3
Faulting application path: C:\Program Files (x86)\Atlassian\SourceTree\SourceTree.exe
Faulting module path: C:\Windows\system32\KERNELBASE.dll
Report Id: f3cba5ce-c1ca-11e4-97cf-782bcbab8ab6