The general operations regarding Shared widget libraries can be found in the main menu 'Widgets->Add/Remove libraries' under the My Libraries tab when connected to your account.
To create a new shared widgets library, perform the following insructions:
Click on the option 'Widgets->New Widget Library' of the main menu. Introduce a name for the new library in the dialog and click 'Ok'.
Once a new library is created, it will be shown, empty, and in edit mode. This library will be only seen by you and only stored locally in you computer until you 'Share' it by clicking on the gear and choosing share.
After creating and modifying your own shared widget libraries, you may want to commit all your changes to your account so all the users which have publishing rights in your account could see them. In order to commit all you local changes at once, click on the option 'Widgets->Commit all shared libraries' of the main menu.
You can also perform individual commits if you only want to commit the changes of a specific library. To perform a library commit see the commit option in the 'Shared Widgets' options.
Notice that after committing the changes, the users willing to see your modifications will have to perform an 'Update' of their shared libraries.
The option 'Update all shared libraries' located in the main menu 'Widgets->Update all shared libraries' allows you to update all the shared libraries at once, retrieving all the new libraries and changes from the server. This option may also remove some of you current synchronized libraries if they have been deleted by their owner or you lost the rights to their related account.