A few people I am aware of that downloaded the game did not have 7zip, one of which downloaded a faulty 7zip, and got a virus.
I use 7zip out of habit, and it compacts things a bit better, but to help prevent future issues, I will now only use the basic zip function, so you no longer need an extra application, as long as I do not exceed the file size set by the site.
Please be aware that, due to the switch, the download file is approximately 20mb larger now, but aside from a few small typo fixes, nothing else is different.
So from now on, you will be free to use whatever program you prefer to unpack folders.

The download count is also nearing 100! I may do something for that as a small addition to the game in the future.