CherryTree Inc review for APO Product Options, Variants

As many others say this app USED to be great. For the second time in a row now we tried to update the app to the new version and the second time was as bad as the first. And mind that every time it doesn't work our configurator is down, which means our products are worthless. So comes the second try they send me again instructions how to do this and I am getting ready at a little down time and as per instruction I delete the old app. The moment I am clicking the link the provided I am getting an error message. And now I am in absolute panic mode because our website is basically broken now, I contact support one time, two times, three times...no response. After about two hours I am getting a reply and it basically says "well you should have done that at 10:00am our time" which is 01:00am my time!!! Great, right? Now my site is broken and nobody helps me. Shopify really needs to come up with an insurance against developers like this because if they'd be in the US I would sue them for damages.