BAW Manual Related Posts – problems

I still use this plugin, even though it is no longer kept up-to-date, because it works! It allows me to add related post links and thumbnails manually, and so doesn’t use a lot of database time like an automatic related posts plugin.

But it has started playing up on me. I have been able to fix a couple of things by amending the code (something I would be hesitant to do if it was still being updated), but my latest problem may be beyond me.

When I try to add related posts, I can click on the ones I want and there is no response – most of the time.

So I’m wondering please:

1. Has anyone tried to modify this plugin and can offer me advice please?

2. Or failing that, are there other manual related post plugins out there that simplify this task, or will I have to do it all manually without a plugin?

Thanks for any help.

The page I need help with: [log in to see the link]