From this message in the forum

https://forums.auran.com/threads/bought-the-c-o-hinton-route-but-is-missing-dependencies.161181/

C&O Hinton is simc:SC276

I opened Trainz Content Store from Trainz 2019 launcher. There were indeed a lot of simc packages and I found simc:sc276. I downloaded it and found that the bad track kink at Mt. Hope was still there. I edited the affected session - BMc C&O Hinton - Coal from Pax Mine to Thurmond to straighten the track. I had to unlock the route and when I went to save it, I was asked to clone the route.

That session is now good on the clone.

I imported the other sessions from my backup, but they weren't showing on the purchased version of the C&O Hinton route. Editing the config file and deleting the line trainz-build 5.2 to 5 fixed that.

A list of trainz-build numbers is at:

https://online.ts2009.com/mediaWiki/index.php/%22Trainz-build%22_number