If you already have VP installed, then try downloading the VP9.0.7.EXE only and run it directly, should work, I use it this way, but with VP9.x.x with Options > Table > Colors and formatting > HD Render checked, you might have to open an older table and Save it in VP9, then close and reopen VP9 before trying the saved version for it to look right in VP9. I would change the name of the table before saving it, something like tablenameVP9.vpt or VP9Tablename.vpt so that you keep an original pre-VP9 copy of the older tables that can still be played in VP6 to VP8.9.
If the table plays in VP8.9 then it should work in VP9, no stuck balls or bad Ramps or Walls, etc.
Tables older than VP8 may not work correctly.