Current questions and answers regarding the map editor.

Replace one building with another on the adventure map, where you can purchase creatures. For example, replace a Demon Tower with an Archers Tower. I will create the condition explaining why it should be changed; I am interested in the process itself. Because I don't know how to delete a building.

First, you can delete a building by setting Object Properties => IsRemovable => true. Then, use RemoveObject(dwelling name) and CreateDwelling.
But the easiest way is to use the function
ReplaceDwelling(name, newTownType, [creatureId1, [creatureId2,
[creatureId3, [creatureId4] ] ] ] )
TownType is the new race of the dwelling. It transforms into a dwelling of the same level (so, an Archers Tower will turn into a Necropolis or a Rampart). It is not necessary to specify the IDs of the new creatures; then, the game itself will set the creatures available for hire, which are by default in this type of dwelling.