after doing a bit of reversing on the Sketch app I discoverd this exploitable part in the code that lets you manipulate the program into thinking you have 1000 trial days left.

run the lldb script together with the address you get from the python script(change the Sketch path to your own Sketch path)

patch the sketch app with radare2, so that you dont have to debug it every time you want to use the cracked version.