No, I'm afraid the train has left the station.

I made a sandbox scenario, placed a small water trough (kinda like a moat) as I wanted the park to be water themed, I then put rides around the inside, then a path around the inside of this. When placing staff, they've all suddenly started to become lost. Even if I fire and then hire new staff, after 30 seconds or so they all stop walking and become 'lost'. I can't figure out why? When I start up the scenario, they move fine, and after 30 seconds or so they all stop moving. Anyone have any ideas? I put a lot of effort into making what I have so I don't want to have to start over.

It's like this.

Go find your Tracks\Coasters folder. In it you should see a bunch of folders, one named for each type of coaster. There should also be two OVL files named coasters.unique.ovl & coasters.common.ovl.

Then go find your Cars\Coaster Cars folder. There you should see all of the folders for the coasters plus two files. CoasterCars.common.ovl & CoasterCars.unique.ovl.

If your Coasters and Coaster Cars folders have more than just folders and the two OVL files in them then you probably put the CTR files in there and not in their own folder as they should be.

When installing CTRs & CS it is best to unzip the file to where you downloaded it in it's own folder. Then check the file structure before you install it so you know exactly what you are putting where so that it is right.

I use two separate windows when I install things. One window showing my downloads and another showing the destination folder. Once I check the folder structure of the unzipped file I then drag it over to the other window to the right folder.

Not everything that is zipped up will always have the same file structure. Some can have an extra folder that contains the folder you need. Unzipping things straight to the destination folder can cause issues if you don't check it to make sure it is installed correctly.

The game is pretty sensitive about files being in the wrong place and can cause crashes or failure to start.

Another thing to check is the contents of every Tracks/Coaster folder and Cars/Coaster Cars folder. Each of those folders should only contain OVL files. If you see any folders inside of the Coaster or Coaster Cars folders then you have that coaster installed incorrectly.