I have just got my 3d printer and i had sliced a file that i had spent a lot of time working on but when i put it in my printer is said it could not print and i realised that it can't print cbt files and i don't know how to slice a file in a .STL file (also i have the free version of chitubox if that makes a difference) and i need help figuring out how to slice a file as a .STL.