To access the "helpful features" within this file, you must first extract it. The format is a high-compression archive that standard Windows or Mac tools might not open by default.
While your query could refer to several things, I am providing a response focused on the most likely intent: How to Use "matsuri.7z" matsuri.7z
Use a free tool like 7-Zip (Windows) or The Unarchiver (Mac). To access the "helpful features" within this file,