You probably have this problem on a Mac, If not send us a message here.
For those that have the problem on Mac :
- Go to the Mac App Store
- Search for an app called “The Unarchiver” and install it
- Right click on the zip file, select get info and change the default program to be opened with to the unarchiver (If one of your files has the same problem I suggest to apply this to all similar files)
- Open the file
If this didn’t solve your problem, please send us a message here.