Whenever I use the program in the canvas the cursor lags.
I am on windows 10 64bits
Check a possible solution here:
I’ve got a set of 16GB DDR3 RAM sticks with an I7 processor. the software was running just fine a week ago.
This looks like the most important information here. Something changed in your computer? did you update Aseprite? Or you was always using v1.2.4 in both moments? are you editing bigger images/sprites? did you change your monitor?