looking to decompile a visual basic exe

Looking to decompile a visual basic exe i made some years ago for kwickfit wheel tracking i made it in visual basic and i never backed the source code up ive made other programs for the latest wheel trackers but there not compatible for the wheel trackers but i need to update some bugs what customers are having im getting so many complaints and i need to do some miner bug updates what will be quick instead of making the whole program whole again

thank you for you time in reading this

Bill.