Copy C:\Program Files\VEGAS\VEGAS Pro 18.0\OFX Video Plug-Ins\proDADMercalli4CmosFixr.ofx.bundle and C:\Program Files\VEGAS\VEGAS Pro 18.0\OFX Video Plug-Ins\proDADMercalli4Stabilizr.ofx.bundle to the same location of VP19
For Mercalli 5 I have transferred the following folders according to your help: proDADMercalli5RtStabi.ofx.bundle proDADMercalli5AutoColor.ofx.bundle and proDADMercalli4CmosFixr.ofx.bundle proDADMercalli4Stabilizr.ofx.bundle works fine after restarting VP19 Pro.