If the file has the .unitypackage extension, just open the file and decompression will be done in your Unity project. To unpack the files in .7z or .zip format, we recommend the"7-Zip" program (http://www.7-zip.org/) if you are using a Windows computer and the"The Unarchiver" program. Http://wakaba.c3.cx/s/apps/unarchiver), if you are working on a Macintosh. If you encounter any problems during downloading or decompression, please do not hesitate to contact our support team.