So actually, importing VBSEO settings doesn't actually work then?
Yes it does. When you import from vBSEO, you import your configuration, and that is working fine
I was on the understanding that you could use the exact same URL's as prior with VBSEO, is that not actually correct then?
You can. The URL structure is identical, but the rewritten titles for certain pieces of content changed in v1.0.9 due to a bug that was first discovered with v1.0.8. In certain scenarios, it would be impossible to resolve URLs that did not contain IDs if the titles were constructed a certain way.
To put it another way: You are lucky that you did not run into this issue with forum titles & vBSEO, if your forum titles had been different in some ways then you too would have ran into this bug.
Example: Let's say you have two forums, one called "Which Tile To Use" and one called "Tile Use". The first forum is for members to ask for advice on the best tile set for their chosen decoration, and the second forum is for showcasing their finished work.
In all versions of DBSEO prior to v1.0.9, both these forums would generate the URL "tile-use", due to the fact that "which" and "to" are stopwords. Therefore, if you do not use forum IDs in your forum URL formats, both forum links would be identical, and thus it would only let you browse the forum that's displayed first.
I can't speak to whether this would also have been an issue in vBSEO, but I would assume so.
This issue was discovered in Albums, where collision is far more likely than forum titles. I tested this with forum titles as well, and discovered that the same issue applied. In fact, it applies to every URL format that does not mandate an ID. For that reason, I changed the code so that stopwords would no longer be filtered from titles if IDs are missing from URL formats. This vastly reduces the chance of conflicts.
If you have an alternative solution, then I would be more than happy to hear it