Dear colleagues. I can't find anywhere a reasonable reason why you can't use add-ons used in purchased or built-in e.g. T:ANE - in other newer versions of Trainz (TRS19, TS22). More specifically, it concerns transferred additions in the form of *.cdp files and subsequent problems with their correctness.
This is strange because in a given version of Trainz you can use the add-on freely, but why I can't use it in another version - I have no idea. As I found out, I can also use most of these add-ons, but only if I install the appropriate routes. These routes are available in the Content Store and are even free. So I have to download them for free even though I will never use them. These are archival and uninteresting routes. To sum up, I have to install routes with paid add-ons for free - it makes no sense
This is because assets are included in the packages with the routes. There may be versions of the assets on the DLS but that's not always the case. You can hide the routes in Content Manager while leaving assets available for use in Content Manager, by creating a customer filter.
Where you see Install, click on the small arrow to the left of that.
Install will be repeated with True on the right.
Click on the + found on the far right.
A new line will show with something random... Usually, Asset Kuid but not always.
Click on what shows and scroll the list until you see Packaged.
Click on the + again
Change the random item again to Category.
On the right, scroll that until you see Route.
You should see only packaged routes.
Select the routes you want to hide.
On the menu bar, click on Content and then click on Disable.
This will hide the route from your selection and should leave the assets available for use.
If you ever want to use the routes, you can enable them by searching for disabled and re-enable them again.