1. Open Content Manager in the original Trainz version
2. Find your route you want to upgrade to a newer version of Trainz
3. Export the route to cdp
4. Go back to the Content Manager and right click on the route to show "List Dependancies Recursively".
5. Sort the list by status to find "Modified". Export these to cdp. If exportin multiple modified items, keep it under 500MB. Do not export any "Built-in" or "Payware" items - they need to be downloaded from withing the new Trainz version.
6. Any "Installed from DLS" can be done from the new Trainz version.
7. If you want to see where "Installed, Payware" comes from, right click and choose "List dependants". That will show what packages it came from.

1. According to the video https://www.youtube.com/watch?app=desktop&v=yJQIrI_wgeY&feature=youtu.be&mc_cid=0751603d6c&mc_eid=b17f3ba020 an Asset Download window should apppear to download paid for content. That didn't happen for me (but there is a workaround https://forums.auran.com/threads/trs-2019-asset-downloads.150509/ ). I think you can do it by clicking on Content Store in the launcher window and install purchased content there.
2. Go to Content Manager
3. Install the cdp's you exported from the old version of Trainz - click and hold cdp file in Explorer to Content Manager.
4. Find your route. It will probably be red with Modified, Missing dependancies. To get the missing DLS content, right click on the route and select Download. When that's done right click on the route again and select "List depencies recursivley". Select the unknown assets, right click and "List Assets in New Window". In the Asset KUID line copy the kuids. Go back to your old version of Trainz content manager and paste the kuids into search box on upper RHS with Filter on "installed". This will show what the assets are. Click on a line and right click and select "List Dependants" to see what routes or packages those assets came from. Go back to the new version of Trainz and download the packages / routes for those unknown kuids. If the assset is not in a route, it may be in a package such as "Additonal TANE Assets for TRS19 for example.
5. When all dependancies have ben satisfied, your route should show up as black in Content Manager.