The OFX plugins I had for VP15 Suite, and VP16 Suite showed up just fine in VP17 Suite and I did nothing. VP15 plugins went to VP16 with no problems. Ignite Pro 4.1 is what works in VP17. It's there running in mine right now. I have all the NewBlue FX from past versions working too. Again, I did nothing to get them to work. Heck, all the Boris FX and Sapphire along with NBFX appear in VP14 Edit. But I have all 4 versions of VP installed right now.
But, I bought Boris Continuum Complete, so won't have to worry about that problem any more.