So When you go to open MCreator, Click on the tools tab first & then it will take you to this. (See images below.) Then Click on the one that has the weird green line. And it should then take you to the texture maker. Oh, & welcome back! It is good to hear from you again.
For the 1953 version I've made missiles & things as a defence from the martians but I want to make it so when a projectile hits a martian ship it will simply bounce off & explode instead of hitting the ship. I still haven't made a model for the ships yet though.