As a possible alternative, you might like to check us out - we are also an inventory app for Etsy. Our software manages both your material inventory and product inventory and is designed to be really simple and easy to use :)
Some screenshots of our app in action are here:
https://craftybase.com/site/featuresWe offer a completely free 14 day fully featured trial (no payment details required - just an email address) and if you have any questions we are very happy to get new users up and running with our app - feel free to contact us here or via our contact page here:
https://craftybase.com/site/feedback