Is there a version without flowgraph or existing part issues? I can't play KSP without this mod.
Edit:
I uninstalled, deleted every KSP folder I could find, then reinstalled. It seems like it's working now with minimal mods installed. I am going to be slowly adding mods untill I find the culprit, and report back if it's helpful.
Theese mods seem compatable to my limited testing:
Breaking Ground (BreakingGround-DLC 1.7.1)
ClickThrough Blocker (ClickThroughBlocker 1:0.1.10.17)
Community Resource Pack (CommunityResourcePack 1.4.2)
Harmony 2 (Harmony2 2.0.4.0)
Kerbal Construction Time (KerbalConstructionTime 1:1.4.11.2)
Kerbal Joint Reinforcement - Next (KerbalJointReinforcementNext v4.1.15)
Kerbalism (Kerbalism 3.14)
Kerbalism - Default Config (Kerbalism-Config-Default 3.14)
MagiCore (MagiCore 1.3.2.5)
Making History (MakingHistory-DLC 1.12.1)
Module Manager (ModuleManager 4.2.1)
ScrapYard (SYD) (ScrapYard 2.2.0.0)
SpaceTux Library (SpaceTuxLibrary 0.0.8.2)
Toolbar Controller (ToolbarController 1:0.1.9.6)
Zero MiniAVC (ZeroMiniAVC 1:1.1.2.4)
