Support

Yes, I have to write that part of the documentation :)

You will need to create two user groups in the User Manager, then assign them global ticket system privileges through Akeeba Ticket System, Options (it's the button in the toolbar), Permissions:
1. Bronze Group. Set all privileges to Inherited.
2. Silver Group. Set all privileges to Inherited. Set Create to Allowed. If you need them to file private tickets and post attachments also set Create Private and Create Attachment to Allowed, respectively.

Important note: both groups should be children of the Public, not the Registered, group in User Manager.

Then we will create a new Viewing Access Level in the Joomla! User Manager. Let's call it "Ticket System Access" and add ONLY the Bronze Group and Silver Group to it.

Now go to the menu manager. Set Access of the menu item to the Akeeba Ticket System to "Ticket System Access".

Now go to Akeeba Ticket System. For each category set the Access to "Ticket System Access".

That's all. You can now automate the user group assignment, e.g. using Akeeba Subscriptions, and you're ready to operate your site.

You should never have two menus with most items duplicated! This can cause huge problems on your site. You should have one menu with all the items for guest (unregistered), bronze and silver members. Using the core Joomla! User Groups and Viewing Access Levels feature (a.k.a. "Joomla! ACL") you can control who sees what. If you put two links to the component's category list page in two different menus I cannot guarantee that it will work or that the URLs will make any sense whatsoever.

You can translate ATS the same way you translate all Joomla! extensions. There is an en-GB.com_ats.ini file in the en-GB language directory in the front- and back-end of the component. The naming convention is imposed by Joomla!. Just taking a look at the language directory contents will pretty much tell you which file does what. It's all in the name. For example, let's analyse en-GB.com_ats.ini:
en-GB: This is the English (UK) language file...
com_: ...of a component...
ats: ...called ats...
.ini: ...and this is the main language file (.sys.ini means it's the "system" language file)

There are a few translations available at http://cdn.akeebabackup.com/language/ats/index.html If you are interested in contributing a translation, please ask to join our translation project at https://www.transifex.com/projects/p/akeeba-ticket-system/

You should do the following:

Two User Groups:
1. Bronze Group
2. Silver Group

Three Viewing Access Levels:
1. Bronze Access -> contains only the Bronze Group
2. Silver Access -> contains only the Silver Group
3. Bronze And Silver Access -> contains BOTH the Bronze Group and Silver Group

So your assignment becomes:
Home -> "Bronze And Silver Access"
Blog -> "Bronze And Silver Access"
Contact -> "Bronze And Silver Access"
Become Silver -> "Bronze Access"

Also set a subscription level relation FROM Bronze TO Silver with a fixed discount of 0.01 (this is required!) and the renewal method set to Replace. This will replace the Bronze subscription with the Silver subscription which results in the user being removed from the Bronze Group and added to the Silver Group when he upgrades his subscription.