The 7.x-2.x version is of this module is only needed to run the database update scripts. It is compatible with Webform 4.x. After database updates are run it can be uninstalled.
This is initial beta release of the this module. The feature set should be set for the 6.1 version of this module. Since over 700 sites have been using the dev version of the module it has been tested to some degree. There are probably still bugs to find.
I have not tested this module out with other Webform add-on modules. There have been issues reported with Webform Rules and Form Builder.
Please report any issues to the issue queue. Feature request will have lower priority then bug issues.