Possible NullReferenceException for btnCreate

[nairol]

I'm not sure if this is really caused by your mod but a search for "btnCreate" (which is part of the error message) brought me here. Sorry if this is unrelated.

KSP version: 0.90
Mod version: 0.5 RC3 (fresh install via CKAN)

Afaik it crashed the game while switching from the VAB editor to the launch pad.

Last few lines in output_log.txt:

NullReferenceException: Object reference not set to an instance of an object
  at btnCreate.OnDestroy () [0x00000] in <filename unknown>:0 

(Filename:  Line: -1)

UnloadTime: 107.869690 ms
Crash!!!
  ERROR: Error while initializing dbghelp.dll, GetLastError: 'The operation completed successfully.' (Address: 00000000)

========== OUTPUTING STACK TRACE ==================

  ERROR: Error while initializing dbghelp.dll, GetLastError: 'The operation completed successfully.' (Address: 00000000)

========== END OF STACKTRACE ===========

**** Crash! ****

First few lines in error.log:

Unity Player [version: Unity 4.5.5f1_7684ad0c5a44]

mono.dll caused an Access Violation (0xc0000005)
  in module mono.dll at 0023:10107170.

Error occurred at 2015-01-10_072956.
C:\Steam\SteamApps\common\Kerbal Space Program\KSP.exe, run by Flo.
84% memory in use.
0 MB physical memory [970 MB free].
0 MB paging file [0 MB free].
0 MB user address space [108 MB free].
Write to location 00000000 caused an access violation.

Full files:
output_log.txt
error.log

Not that much information unfortunately...

Thanks for your mod!