I downloaded the .zip from the download page yesterday and the support forum plugin version is the one you mentioned. Sorry I was in a rush yesterday, I’ve played with it a little more and now know what I did. I clicked the (to front) bit of the make sticky link. And this does exactly that and sticks the topic to the top of the discussions on the front page. I didn’t think it would hide the topic from the forum it belongs to, so I was a little confused.
Thanks for your reply, and my apologies for not investigating further before posting here.