Hello!
I think you can change things for this mod at ckan, because it updated for ksp 1.1, i have ksp 1.0.99 and then nothing had drag anymore, so I destroyed some of my spaceships (luckily it was all not manned :D)
downgraded manually but it would be fine if you could fix things... (maby by adding more boosters XD )
Thanks LilaKuh