Thank you so much for your positive feedback!
Right now we are working on updating the "How to" page (https://www.appmindedapps.com/rpgplushowto.html) and creating some video tutorials, especially on how to navigate the map room and its features.
About the zoom, after checking few software we decided to set: scroll up the mouse wheel to zoom in, scroll down to zoom out.
For any other questions or comments please feel free to contact us.