There seems to be something wrong with the 0.14.0preview1.
I redid my small thruster using the new thruster_small.txt and added the ID to my mod. I then compressed the mod and added it to cosmoteer. It asked me if I wanted to override the broken mod, I clicked okay, then I said I needed to restart cosmoteer to effect the changes as usual.
Then things got spooky.
Firstly, even thought I turned the mod "ON" it did not say "Loading assets for the first time, this may take longer than usual"
Secondly, I went into the "Flight" category and my small thruster was not there, yet the mod was defiantly on.
Here is my mod (the updated one):
http://www.mediafire.com/file/6ebael1xoca9odv/GCW_mod.zip
Its supposed to add a new Thruster (FlightTech Small Thruster)