VTools 4.0 'Plot' button should show up under insert menu (ribbon) of excel 2007 and 2010.
Sorry for not including this information in the update email.
1. VTools can now check for updates itself. This option is enabled by default
2. While checking for update, it can also share usage data with VTools.net. I will be much obliged if you enabled this option. By default, this option is disabled.
3. Every error is now logged in a text file called "VTools_Error.log". Location of ths file is same as the location of the add-in file. When reporting bugs, please include last few errors from this file.