Power Inspector supports Unity version 2017.3.0f3 and newer.

When a new update is released to Unity which alters the inspector experience in some way, it is possible that it might cause some issues in Power Inspector. If this happens, I will try to patch in support to Power Inspector as fast as possible, but there might be a delay of few days, especially because Unity’s approval process for patches also takes some time.

Beta versions of Unity might also cause issues in Power Inspector. I will try to keep Power Inspector compatible even with them, but it’s still more likely that you will run into issues with them.