3. Go to the extracted folder and run it with ./wassabee
Maybe the problem is choosing the right direction. I have encountered it when I used the Linux OS for the first time.
You should change the current directory to the one containing the file to execute using "cd" command or, if you want to run it from any directory, you have to enter the full path of the file (if you encounter problems with permissions, try running it by adding "sudo").
I think it is also possible to execute it and get the full path by dragging the file from graphical interface to the terminal.
Wasabi 1.1.1 was release today and it comes in a .deb package for those using Debian-based distributions.
That solves the problem, all it needs now is to double click the .deb file