FYI, you can rebuild the wpilibjSimulation.jar file yourself without to much trouble. The source code is located at
https://github.com/wpilibsuite/allwpilib
git clone
https://github.com/wpilibsuite/allwpilib.git
cd allwpilib
git tag --list ( this command will show the release tags available )
git checkout v2017.2.1 ( or whatever the latest release tag is )
./gradlew -PmakeSim :wpilibj:wpilibjSimJar
cp wpilibj/build/libs/wpilibjSimulation.jar ~/wpilib/simulation/jar/
The benefit of building it yourself is fixing any issue you see such as simulated motor controllers not having a setInverted method.