how do i reset the standerd version
You actually can't, cause you need to delete file named "Lemon", files is only in Ms. Lemons++ that you need to buy. No other solutions.
Check your AppData (accessible via turning on Hidden Items), go to the "roaming" folder, then the "MMFApplications" folder. Erase the file(s) named Ms.LemonS and/or Mr.TomatoS.