There have been a few quick fixes for Hive Engine Tools to fix some problems that come up due to Hive Engine API changes.
The Hive Engine Miner Break-Even and Buy/Sell Average tools broke due to Hive Engine removing some old variable references to Steem.
If you have an application that uses Hive Engine API (specifically market orders) you may need to make some changes to update refences to quantitySteem which has changed to quantityHive.
If you haven't checked out Hive Engine Tools, I recommend giving it a go. There are a lot of cool tools completely free to use.