Hello, thanks for your kind words. The default behavior in Webmaster User Role is to Show the Appearance > Themes menu so that Webmaster/Admin users can access Widgets, Menus, and the Theme Customizer sections of wp-admin. Although they can view Themes in the menu, they can’t install/uninstall/activate/deactivate/switch themes.
Webmaster User Role doesn’t have any settings, we aim to make the plugin work well by default but there will also be case-by-case customizations you’ll want to make. Here are some great options to take a look at:
Free
There are free options for tweaking WordPress user roles (including Webmaster), installing one of these plugins gives you options to tweak their permissions:
https://www.ads-software.com/plugins/capability-manager-enhanced/
https://www.ads-software.com/plugins/user-role-editor/
Also take a look at https://www.ads-software.com/plugins/admin-menu-editor/which would give you more direct control over the menu.
Paid
Webmaster User Role Pro offers more control over what our plugin hides/shows and integrates with supported 3rd party plugins. You can learn more at https://tylerdigital.com/products/webmaster-user-role/
As far as updates, if you log in as your administrator account and go to Dashboard > Updates you should see the latest version (1.3) available as an update.