How to reinstall/uninstall a GRF?

[griffinrails]

Hi all.
I downloaded the AuzTrains NSW Set a while ago and I'm trying to update it. How do i?

[Emperor Jake]

I would just download the latest version but keep the old one to maintain compatibility with old savegames. If they have the same filename you can just rename it, the game doesn't care what they're called.

[mak]

From start screen select: check online content.
next screen select: select upgrades, if it is highlighted, otherwise there is not an update/upgrade avaiable
select: download, again if highlighted

[griffinrails]

Ok, how do I install a NewGRF file outside of the game itself?
As in downloading the file from my web browser.

[jfs]

You place the files you want the game to load under your Documents/OpenTTD/ folder. Things downloaded by the in-game content downloader are under the content_download/ subfolder, you can delete things from there if you want to get rid of it, either just because you no longer want it, or because you want to re-download it.

When you want to install things manually, place them in the appropriate newgrf/, ai/, scenario/, and so on folders directly in the OpenTTD/ folder.
If things come in ZIP file or similar, you need to extract the archives.