It's been a few years since I fired DCS up. I could not update the existing version without it crashing so I uninstalled everything and reinstalled DCS world 1.5. Found download links for the modules from the original receipt email from ED but the uh-1 install said I needed a newer version.

What's the best way to get this going again?

You need to use the ingame module manager. It's the square that is made up of smaller squares on the upper left of the main menu screen.

got it! thanks! didn't even need my keys.