I'm having similar problems ->tried install on several versions of Unity 4.9, 5.0, 2017, and now back to 5.4.0p4(all personal editions). Loaded TextMesh (current version) says it is for u5.x,a few others, and 2017. Have part tools window in editor but can't spawn interiors correctly, I get the models, but a bunch of texture errors:
Texture 'Squad/Props/buttonsGeneric/ButtonsAndSwitches' not found!
UnityEngine.Debug:LogError(Object)
KSPPartTools.PartReader:ReadTextures(BinaryReader, GameObject)
KSPPartTools.PartReader:ReadChild(BinaryReader, Transform)
KSPPartTools.PartReader:Read(UrlFile)
KSPPartTools.GameDatabase:GetModel(String)
KSPPartTools.PartUtils:CompileModel(UrlConfig, ConfigNode, Single)
KSPPartTools.PartUtils:SpawnProp(Transform, UrlConfig, ConfigNode)
KSPPartTools.PartUtils:SpawnProp(Transform, String)
KSPPartTools.PartUtils:LoadSpace(InternalSpace, UrlConfig, ConfigNode)
KSPPartTools.PartUtils:SpawnSpace(UrlConfig, ConfigNode)
KSPPartTools.PartToolsWindow:DrawSpace(UrlConfig, ConfigNode)
KSPPartTools.PartToolsWindow:DrawSpaces()
KSPPartTools.PartToolsWindow:OnGUI()
UnityEditor.DockArea:OnGUI()
the textures are clearly there (is it because they are dds?) is this normal?
I've been at this for a week now, and it has never taken this long to get an ide/development tool set up for use before. Previously, I have been able to develop parts and install them in the game, even with my own modules, but now, I am stuck on this (got here trying to learn to create iva's) and I am considerably frustrated. Thanks for your time.