A couple of issues,
1) Why no download of previous versions of The Ultimate SEO URL (not that I could see, anyway), like you get on phpbb.com, to support those running previous versions of phpbb (pre 3.10)?
2) Some install directions for those running Magic SEO URL (effectively a competitor), on how to disable this. I did try and fail to install the 3.10 version on 3.09, and did notice the Ultimate installer removed the Magic SEO line of code from common.php, even PM me, if this is not something for the forum.
I did want to try the greater URL control that Ultimate offers, but unfortunately could not get it working on 3.09, but kind of expecting this, I had everything backed up beforehand.