Yes, those are in your profiles/sequences and those should work just fine with SGP3. If you have set a new profile directory in the Options you may have to change that again in SGP3.
You won’t have to. When you are logged in and you go to our store you’ll see the upgrade option that is priced for the addons you have. Not logged in:
Logged in (this user only has SGP2 with no addons…if you have the FMW you would see a price of $39)