Most computers have a standard program that unzips files. As mentioned above, usually double-clicking on the file, or right-clicking and then "extracting" it, will do the trick. Alternatively, you can download a free program, such as
WinRAR, which will unzip the 1-on-1's for you.
If there are still any issues, check out the
Knowledgebase or simply submit a support ticket directly at
http://www.theory11.com/support; the support crew will take good care of you.
Cheers,
JTM