If you've got the ANGER ending in MrTomatoS, he will have the control over the MsLemonS too. But if you reset Mr.TomatoS, you would be able to play both games.
There is a MrTomatoS File hidden in your Appdata folder, all you have to do to reset mr. tomatoS game is to go to this location called "%userprofile%/Appdata/Roaming/MMFApplications/" and then open the MrTomatoS File, open with notepad, wordpad, it's all ok, and then set anger=1 to anger=0 and set close=1 to close=0, ur welcome!