I could only get PT 2017 to downdate to PT10 as the PT9 update didn't work with the PTSEQ32.dll version.
http://www.pgmusic.com/support_windows_pt.htm#10-3

It depends on how you use PowerTracks, but you might be better making the big jump of learning a new DAW like REAPER that you can customize more if you are not happy with PT.
Or, there's another option of using ReWireVST with PT ???
http://www.pgmusic.com/forums/ubbthreads.php?ubb=showflat&Number=371691

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