Click SourceTree.exe
Application does not start

In Event Viewer we can see two errors logged:

Log Name: Application
Source: .NET Runtime
Date: 29/04/16 11:53:26 PM
Event ID: 1026
Task Category: None
Level: Error
Keywords: Classic
User: N/A
Computer: NYX
Description:
Application: SourceTree.exe
Framework Version: v4.0.30319
Description: The process was terminated due to an unhandled exception.
Exception Info: System.Configuration.ConfigurationErrorsException
Stack:
at System.Configuration.ConfigurationSchemaErrors.ThrowIfErrors(Boolean)
at System.Configuration.BaseConfigurationRecord.ThrowIfParseErrors(System.Configuration.ConfigurationSchemaErrors)
at System.Configuration.Configuration..ctor(System.String, System.Type, System.Object[])
at System.Configuration.ClientConfigurationHost.OpenExeConfiguration(System.Configuration.ConfigurationFileMap, Boolean, System.Configuration.ConfigurationUserLevel, System.String)
at System.Configuration.ConfigurationManager.OpenExeConfigurationImpl(System.Configuration.ConfigurationFileMap, Boolean, System.Configuration.ConfigurationUserLevel, System.String, Boolean)
at SourceTree.App.SetStartupJIT()
at SourceTree.App..ctor()
at SourceTree.App.Main()

Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
<Provider Name=".NET Runtime" />
<EventID Qualifiers="0">1026</EventID>
<Level>2</Level>
<Task>0</Task>
<Keywords>0x80000000000000</Keywords>
<TimeCreated SystemTime="2016-04-29T14:23:26.000000000Z" />
<EventRecordID>29006</EventRecordID>
<Channel>Application</Channel>
<Computer>NYX</Computer>
<Security />
</System>
<EventData>
<Data>Application: SourceTree.exe
Framework Version: v4.0.30319
Description: The process was terminated due to an unhandled exception.
Exception Info: System.Configuration.ConfigurationErrorsException
Stack:
at System.Configuration.ConfigurationSchemaErrors.ThrowIfErrors(Boolean)
at System.Configuration.BaseConfigurationRecord.ThrowIfParseErrors(System.Configuration.ConfigurationSchemaErrors)
at System.Configuration.Configuration..ctor(System.String, System.Type, System.Object[])
at System.Configuration.ClientConfigurationHost.OpenExeConfiguration(System.Configuration.ConfigurationFileMap, Boolean, System.Configuration.ConfigurationUserLevel, System.String)
at System.Configuration.ConfigurationManager.OpenExeConfigurationImpl(System.Configuration.ConfigurationFileMap, Boolean, System.Configuration.ConfigurationUserLevel, System.String, Boolean)
at SourceTree.App.SetStartupJIT()
at SourceTree.App..ctor()
at SourceTree.App.Main()
</Data>
</EventData>
</Event>

And:

Log Name: Application
Source: Application Error
Date: 29/04/16 11:53:26 PM
Event ID: 1000
Task Category: (100)
Level: Error
Keywords: Classic
User: N/A
Computer: NYX
Description:
Faulting application name: SourceTree.exe, version: 1.8.3.0, time stamp: 0x56f18db8
Faulting module name: KERNELBASE.dll, version: 10.0.10240.16384, time stamp: 0x559f38c3
Exception code: 0xe0434352
Fault offset: 0x000000000002a1c8
Faulting process id: 0x3380
Faulting application start time: 0x01d1a222b19f1e19
Faulting application path: C:\Program Files (x86)\Atlassian\SourceTree\SourceTree.exe
Faulting module path: C:\windows\system32\KERNELBASE.dll
Report Id: 2aabe641-b445-47da-bdae-84fcc68250e5
Faulting package full name:
Faulting package-relative application ID:
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
<Provider Name="Application Error" />
<EventID Qualifiers="0">1000</EventID>
<Level>2</Level>
<Task>100</Task>
<Keywords>0x80000000000000</Keywords>
<TimeCreated SystemTime="2016-04-29T14:23:26.000000000Z" />
<EventRecordID>29007</EventRecordID>
<Channel>Application</Channel>
<Computer>NYX</Computer>
<Security />
</System>
<EventData>
<Data>SourceTree.exe</Data>
<Data>1.8.3.0</Data>
<Data>56f18db8</Data>
<Data>KERNELBASE.dll</Data>
<Data>10.0.10240.16384</Data>
<Data>559f38c3</Data>
<Data>e0434352</Data>
<Data>000000000002a1c8</Data>
<Data>3380</Data>
<Data>01d1a222b19f1e19</Data>
<Data>C:\Program Files (x86)\Atlassian\SourceTree\SourceTree.exe</Data>
<Data>C:\windows\system32\KERNELBASE.dll</Data>
<Data>2aabe641-b445-47da-bdae-84fcc68250e5</Data>
<Data>
</Data>
<Data>
</Data>
</EventData>
</Event>