Site map does not display in DNN 5.1.1 see error

Error: DNNMasters Site Map is currently unavailable.
DotNetNuke.Services.Exceptions.ModuleLoadException: Method not found: 'Void DotNetNuke.Entities.Tabs.TabInfo.set_AuthorizedRoles(System.String)'. ---> System.MissingMethodException: Method not found: 'Void DotNetNuke.Entities.Tabs.TabInfo.set_AuthorizedRoles(System.String)'. at Apollo.DNN_Localization.LocalizedTabInfo..ctor(TabInfo tab) at Apollo.DNN_Localization.LocalizeTab.matchLocalTabToTab(TabInfo objTab, ArrayList arrLocalTabs) at Apollo.DNN_Localization.LocalizeTab.getLocalizedTab(TabInfo objTab) at DNNMasters.SiteMap.SiteMap.addNode(SiteMapNodeCollection pNodes, TabInfo pTab, Int32 portalId) at DNNMasters.SiteMap.SiteMap.BindData(Int32 portalId) at DNNMasters.SiteMap.SiteMap.setDataByPortal(Int32 portalId) at DNNMasters.SiteMap.SiteMap.Page_Load(Object sender, EventArgs e) --- End of inner exception stack trace ---

The settings page is still available
Is there a patch available?
Thanks

There is a dnn 500 version available on Snow or else email support@ with proof of purchase and I'll send you new version 4.x

Fixed
I had installed the latest version 4.0.14, but it had installed as a new module not as an upgrade of the previous version.
I have now installed a new module and deleted the old

Yes, that's correct.
Version 4.x is a new, separate module not an upgrade to 3.x.
Please note the Google Sitemap new feature - web service which is much better than XML sitemap as it's generated dynamically and doesn't require scheduled or manual rebuilds.

I am having trouble uninstalling version 3.2.40 from dnn 5.5.0. When I click on "uninstall this extension" and then uninstall on the next screen, I get a critical error about the viewstate being invalid. If I need to uninstall manually what are all the steps?

Delete definitions one by one and the module tables and procedures from database. They are clearly marked in names.
You can also run the Uninstall.SQLDataProvider script that should be part of the PA.

the sitemap v3.2.40 does not use any sql tables. I deleted all the files, but how do I delete the module from the extension list in dnn?

Enter "Edit Extension", delete control definitions and delete module definition

It seems the problem is whenever I enter to delete or edit this particular extension "none of the others do this" the entire website repeats itself twice. So at the bottom of the resulting page I have another admin menu and content. Weird. I think this is why I cannot delete the module "and now cannot edit either" and get the viewstate error. I have sent support login info for my install. See for yourself what is going on.

Can't access module definitions with admin account.

Oops. Try "host" with same password.

Weird, it's the same for me.
Just let it be or delete manually from database.
I installed latest version and added it to 404 page. It's working correctly.