[OPEN LOW] Decals I can't use

So...

When I currently go to the Decals to spruce up the place, it flicks to the Ambulances tab, displays the decals in the main window, but I can't use them... Any suggestions?

Hi, thanks for the report! This is a rare issue we've only seen 3-4 times during the whole development process and so far there's been no indication of what goes wrong.
Exiting to menu and reloading your save should help (or restarting the game).
If you could attach your log file from after it happened, that could help if there's a hidden error, but I don't think that's the case here. I'm keeping this open for now.

How do I attach a log file? (I'm a noob)