At home when I am working in a table, to add or delete a row I just select any cell and right click. The menu has the options I need. At work when I do the same thing the menu that pops up does not have the same options and will not let me add or delete rows, columns, etc. Any ideas?

i downloaded tablebar and when ACAD started the toolbar was there but when i click on any of the icons i get a message in the command line that says unknown command. When i download where should i save the new file? Is there something else i need to do to get the tablebar toolbar to work? The video demo on the website looks like it will do what i need.
thanks