Please follow the instructions carefully. "N.B : BEFORE UPDATING TO THE LATEST VERSION, WE WOULD HIGHLY APPRECIATE IF YOU KEEP A BACKUP OF THE EXISTING VERSION." Let's proceed, - Go to system settings from settings menu in admin panel - Move to the section 'Update Product' on that page - Upload the file 'update_4.0.1.zip' which is located at "update_pack" folder inside your copy of Academy app downloaded from Codecanyon - Hit the button 'Update'. - That's it ****REPLACING THE STRIPE LIBRARY**** - If you have done this without any issue facing, now its time to replace the existing Stripe library with the latest one. - Open the "update_pack" folder and copy the "Stripe" folder. - Replace it with the existig "Stripe" folder. Which is located at "application/libraries/Stripe" PLEASE MAKE SURE THAT YOU ARE RUNNING THE 4.0 VERSION BEFORE UPDATING TO 4.0.1 IF YOU ARE ALREADY RUNNING THE 4.0.1 VERSION THERE IS NO NEED TO UPDATE… Thank You