From version 6.0 until version 9.0, registered users could download the newest versions of the software, enter their original registration information or install over the top of their existing registered version, and thereby obtain a free upgrade. As of version 10.0 this upgrade scheme was discontinued. WinZip is available in standard and professional versions. However, the ability of Windows XP and later versions of Microsoft Windows to open and create .zip files (as "compressed folders") has reduced the need for extra compression software.
In May 2006, Corel Corporation, known for its WordPerfect and CorelDRAW product lines, announced that it has completed acquisition of WinZip Computing.
WinZip has a 45-day free evaluation period, after which the program would still work even if the user had not registered, albeit with reduced functionality. However in later versions this feature appears to have been removed, although users are able to bypass this by downloading an earlier version.