BuildOrders.exe is a text-based application which lets you script and test build orders for AoE3.
See this google doc for a specification of the scripting language: https://docs.google.com/document/d/1Ny8elpZZ-BK2k5uxP4wK2tc6-quKHzUys1xJsSpVx0Q/edit?usp=sharing
It's possible you will need to make a manual exception for this app in your virus protection software.
Update notes: https://docs.google.com/document/d/1SjViDhZ09KFLPrveCKDK8mEvNTYcZ4GLxxPlFMnBGEo/edit?usp=sharing