Nisus Software has released Nisus Writer Pro 2.1, an update to their word processor for Mac OS X.

Now 640bit and sandboxed, version 2.1 includes iCloud support, autosave, versions, bug fixes, improvements, and macro language enhancements. These join a feature set that includes multilingual text support, powerful find and replace, a style system, and more.

Nisus Writer Pro 2.1 also contains the following fixes and additions:

°Added support for Mac OS X autosave, where changes to all opens documents are saved regularly;

° Added support for Mac OS X document versioning, where a user can browse and revert to older versions of any document.

Nisus Writer Pro can be updated from within the app. Select "Check for Updates" from the "Nisus Writer Pro" menu and follow the instructions. You can also download the update from the Pro update pages (http://nisus.com/pro).

Nisus Writer Pro 2.1 requires OS X 10.7.5 or above. It's available now from the Nisus website and soon from the Mac App Store. It costs US$79; an upgrade from Pro 1.x is $49. A three-license Family Pack is available for $99. An academic version is also available.