How can I fix the Hotcakes Administration page URL?

This is caused by a known bug in the CMS.  However, with a bit of SQL, you can easily fix it.  Either that, or simply put the fully qualified URL into the page URL field for the page settings of the "Hotcakes Administration" or "Commerce" page.  

If you prefer using a virtual URL instead, run the SQL below on your site, to find and update the incorrect URL instances.  The first query will help you find and verify the information that needs to be updated, and the second query updates the URL.

SELECT * 
FROM [dbo].[Tabs] 
WHERE [Url] LIKE N'%Hotcakes%';

UPDATE [dbo].[Tabs] 
SET [Url] = N'/DesktopModules/Hotcakes/Core/Admin/Default.aspx'
WHERE [Url] LIKE N'%Hotcakes%';

Use this version if you're running the SQL from within the CMS's SQL page.

SELECT * 
FROM {databaseOwner}[{objectQualifier}Tabs] 
WHERE [Url] LIKE N'%Hotcakes%';

UPDATE {databaseOwner}[{objectQualifier}Tabs] 
SET [Url] = N'/DesktopModules/Hotcakes/Core/Admin/Default.aspx'
WHERE [Url] LIKE N'%Hotcakes%';

You won't see this update applied right away.  You'll need to clear the CMS cache to see it working.