This is the site where now the backup (jpa from Akeeba Backup) is exactly twice the size of what it was.
In the back end, I no longer have access under Menus > Menu Manager > Menu Item Manager. Instead of the 7 published menus, my list is empty.
My choices now are to restore to the date of the last backup before I implemented the changes (at least this is a backup that is half the size of the current backups). These half-size backups are my benchmark.
At least I can work through the site again (install Admin Tools, configure, implement), make the changes slowly, test after each one, find out what is causing the site to double in size, and what causes my menus to disappear from the back end.