After creating my 'Simple Guide to editing scenarios with RWTools,
https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=587606467
I was asked "how can I do this with newer routes, they don't seem to show up?"

The reason for this is for some reason, DTG decided to package all newer content in what's called an '.AP' file This means that all the usual files are basically in the equivalent of a 'zip' or 'rar' file that i'm sure most will be familiar with. However, RWTools CAN read these files, it just needs to know where to look and here's how it will find them.

For this example, I will be using the 'Riviera 1950's' route that came with TS 2016. Firstly, you'll need to know where the route's folder is, the easiest way is to select 'Build' from the main menu in game, then scroll down until you're on the route. The route's folder will be displayed in the blue box on the right.
Now you know the folder, in this case C:\Program Files (x86)\Steam\steamapps\common\RailWorks\Content\Routes\00000059-0000-0000-0000-000000002015
Open it and double click on the route's '.AP' file (labeled MainContent). Windows won't recognise this and will ask what you want to open it with (if you've not allocated a program to .AP files before), in this case I use 'WinRar', and the compressed .AP file will open.

Here you can see the route folder top left, the RWTools window on the right with no listing for the Riviera 1950's route and the newly opened WinRar window on the bottom left. Now, see the 'RouteProperties.xml' file? Click on it and drag into the route's folder above. This won't move it but will copy this file,
Now close WinRar, close and re-open the RWTools window and voila, your still packaged route is now visible in the list, job done!

As always, comments / questions welcome below, hope this was useful!