Migration tool was designed to migrate 32bit addons from FSX to a 32bit version P3D. Do NOT install any addons into P3Dv4.1 with Migration tool, or any other way, unless the addon developer actually says that it was designed for P3Dv4 or P3Dv4.1. Sometimes it will work, but most ...
Migration Tool to install E Jets in each version of P3D, following the standard advice to install as administrator. I have seen no evidence of it 'messing up' any other addons, and I have quite a lot. Similarly, the E-Jet sound files are discrete to that product and stored in ...