Rated 5 out of 5 stars

love the extension...but i wish i could add my own auto-corrections...in the options box, the "save list", "add", and "delete" buttons are all greyed out....i hope someone can address this!...thank you for your work!

This review is for a previous version of the add-on (1.0.3). 

I know this is crazy, but it works. Someday I'll figure out how to make it nice.
Test case: replace "this" with "that"

Tools -> Add-ons -> mmsAutoCorrect -> Options

In the Replace box, type "this" (without the quotes, of course)
Then hit the backspace key
Then hit the s key again
Then tab to the With box
Type "that" (again without the quotes)
When you type the first letter, the Add button should light up

Let me know if this doesn't work.

Thanks for your patience.