I run Active Sky and Sky Force on the same client PC in my network. I run both simultaneously (Sky Force weather engine disabled). Have no problems. Using P3D v4.
there is a beta 1.18 version up at the ezdok forum at
http://www.simforums.com/forums/welcome-to-118-betatest_topic51090.html
worked for me with FSX original, FSX Steam and Prepar3D V2 installed.
Has a new installer so you choose you sim.