GD bbPress Toolbox Pro 4.5.1 is a maintenance release, that fixes several bugs reported in the past week related to new topic reading tracking features, and some issues with multisite blog switching.
Topic tracking feature for marking new, unread and topics with new replies is improved with two fixes: in some cases topic was set as unread, even when the user has posted the reply in the topic, and first new reply link was always linking to the last reply.
If your website was using blog switching functions in a multisite environment, GD bbPress Toolbox Pro was not properly switching names of its tables, causing problems with some queries. Same thing was happening if you delete the blog in the network, and you might end up removing rating tables for the main blog. So far, no one reported this as an issue, but it is important to have this fixed to avoid any potential problems.
If you find any more problems, please stop by the forums to report them.