Many will have noticed that the Active Tool Manager has been replaced by the Attribut Manager. If you still want to use a seperate manager for tools there is a simple way to achieve this. Open a second AM and dock it behind the first. Now Choose->Configure Modes and disable all but Tools. Do the opposite (diasble Tool) for the other AM.
Now you have two AMs one for Tools and the other for everything else.
The nice thing about the new Tool manager is that you can switch between used tools with the arrows in the AM. You can even rename it.
Please find an example layout for modelling here