whoa, people getting mad over something as simple as how to decompress a file? 
How's it simple if the dev changes the filename extension and doesn't inform the community? you try to decompress it, the utility throws an error and aborts due to invalid filename/filetype or whatever, the dev doesn't list what type of file it was or how it was compressed so it can be easily decompressed. I still haven't been able to decompress Lottocoin's .zip download (uniextract says it's not a zip file, winrar doesn't recognize it either as a .zip or a .rar) I tried gunzip, i tried changing the extension to .rar, .tar.gz, .gz, tgz, .7z among others and nothing will decompress it and the dev is AWOL so asking what type of file it is isn't an option. I even scanned the archive with both winzip and winrar and it isn't corrupt, they just changed the extension and didn't inform about it in the ann. courtesy shouldn't be too difficult a thing for people in here to have. now I realize some file hosts will only let you upload .zip files but for the love of pete list in your ann how to decompress the file and what to change the extension too.
it was a blockchain file. Look if ya have to change the file extension to get your host to accept it, atleast say something in the ann like "Yo, my file host only allows .zip files so you have to change the extension to .tgz or whatever to unzip it" it only takes a second, and it's the polite thing to do. it avoids annoying people. 
