A .zip file is a container. To use the contents, you must extract them: the file in your downloads folder. Select "Extract All..." (Windows) or double-click (Mac).
: If it's a web project, open this in your browser. Descargar UMYOP TNK zip
: Before opening, run the file through a scanner like VirusTotal to check for malware. Descargar UMYOP TNK zip