@trainz2019simplayer
1.) Buy your FCT here (First Class Ticket) - Gives you access to higher speed downloads. Choose the 1 year option, (it's the best price per day) -
Trainz First Class Tickets - FCT
2.) Like
@dangavel said, d-load the DLC routes via the launcher Content Store button
3.) After downloading any route, right clik the route and choose download, and the content manager will download all of the missing dependencies that are on the DLS. After that process finishes, you may have sub-dependencies to download. Right-clik the route again, choose show dependencies. Go down the new list of deps and download the sub-deps for each as needed. Right clik, download.
4.) After all that, you may have missing deps that are NOT on the DLS.
5.) Setup your CM window with all the available tabs. Right clik the area in this pic and add all the available tabs except modification date. That one's not very useful for most Trainzers.
6.) To find (non-DLS) missing deps > Use Google to search the kuids, you can highlight a missing kuid in CM, use Ctrl-C to copy the kuid info, then paste into Google. Go to the website and download the missing dep(s). They are often inside .ZIP files, and will have to decompressed with WinRAR or 7-ZIP. Inside you will find CDP files (orange) that can be drag-dropped onto your CM window to install. You can also subscribe to
Trainz Kuid Index @15 USD per year to make the annoying task of kuid hunting significantly easier.
7.) Lastly, if there any faulty (Red), errors for any deps, you can right-clik each faulty dep and choose "View errors and warnings" > Yellow warnings can be left alone. High light the red errors and paste into a post on this forum (post in General thread), asking for help resolving the error(s). This may require you to edit the asset config file, fix an image in an image editor (i.e Phostoshop, GIMP, or use a PEVSoft app to edit/fix another asset file.
This should be enough info to get you going, I hope

I'm sure other Trainzers will add addendums/corrections to this post, they always do ! LOL (You know Who You Are)