UPDATE:
If you downloaded the update or the full version for STM v 1.9.1.2 before 2am this morning, march 1st, you will need to download a
FIX 1.9.1.2
I added an ability to the some of the hulls that effected the movement adversly. This has been corrected. If you have not yet downloaded the latest version, then your ok. Don't worry about it.