Ah, you might have to uninstall it from Galaxy first. Import folder is probably greyed out because Galaxy thinks the game is still in its old place so there's no need to import.

You forgot the step to uninstall the game as I mentioned earlier.

Thank you so much all for your help, I now have the game installed onto a new drive.. we got there in the end: Now I just need to know how to get onto this Super Highway..

You mean the information superhighway?

No the Super Highway in this game..

Oh, that game! Silly me.

You need to find the wizard.

https://www.gog.com/forum/general/wheres_the_wizard

No the games X4 Foundation..

Ahh, well that's a helpful piece of information. You may notice that you hadn't mentioned what the game was until now. :P

In that case I can't help as I don't have it. You'd probably have better luck asking a question like that in the X series subforum instead of general discussion.