There are a number of reasons why I stopped maintaining it, one being that I moved out of Birmingham and could no longer reach all of the repeaters in it! Since then, a number of software options have become available which have made the creation of codeplugs much easier.
The last of these codeplugs that I produced was in May 2016 and is available here. You are welcome to download and use it as you wish but please bear in mind that talkgroups, networks and repeaters may have changed significantly since them. As much as I would like to, I am sorry that I cannot offer any support with this codeplug now.