We have released v1.6 of influence maps for unreal.
This version adds a component visualizer which shows the map dimensions when you edit width, height and cellsize without entering a PIE session.
Adding a component visualizer to a component in Unreal Engine (youtube.com)
Also influence maps are 50% off until the 4th.
https://www.unrealengine.com/marketplace/en-US/product/wise-feline-influence-maps