I have happily imported and used setups for a long time. This is a new problem.

If I download a setup it does not appear in the list in the garage.

Exiting garage or swapping to another car and back doesn't make any difference. Neither does restarting the game.

Suggestions please...

Its possible that the setup file isn't named correctly.

eg. 'XF GTI_bl1.set' will work, but 'XFGTI_bl1.set' won't.

Checked that, nope. Is there a maximum number of setups you can have?

Quote from Seahorse :

Checked that, nope. Is there a maximum number of setups you can have?

I guess yes, because one of the lines in translation is: "Reached maximum number of setups"