I've created a tool that might help in fixing the editor; it supports unpacking the .pak files of the game/mods and editing LSX/LSB files (including savegames).
Linky:
https://dl.dropboxusercontent.com/u/32263228/lstools.zip(note: LSB saving is still experimental, so always backup stuff before you edit!)
Edit:
If the app is not launching because MSVCRT110.dll is missing, install the Visual C++ 2012 runtime (the x86 version):
http://www.microsoft.com/en-us/download/details.aspx?id=30679
