Although there is no charge to download the evaluation version of WinZip, WinZip is not free software. The evaluation version gives you the opportunity to try WinZip before you buy it to check if it works for your needs. Anyone may download the evaluation version of WinZip from the WinZip website.
If you would like to continue using WinZip beyond the evaluation period, you must purchase a WinZip license. You may do so by selecting one of the available options on the WinZip website.
If, after the evaluation period, you decide not to purchase a WinZip license, then at that point, you should remove WinZip from your computer. Please see How to uninstall WinZip for the correct steps.