I have been making Zip Backup of my last sequence and to check it had worked I decided to unzip and then reload into PTE.
I double clicked on the file. It didn’t work I just got an error 1 message or on another occasion it just reported unable to complete, Failed.
I asked a friend if he was able to un zip the backup. It worked for him he was using Unarchiver.
So I tried right clicking and accepted the default suggestion, it still didn’t work.
I then downloaded “ The Unarchiver” from the App store. The next time I right clicked on the file, when Open with came up I chose