Although it lacks a changelog, the BlackBerry Print to Go desktop software has been updated to v1.0.161 today. if you're not familiar with the app, it allows you to 'print' your documents to your BlackBerry PlayBook instead of a traditional printer.
Granted, the app is oddly named but it's a pretty cool feature to have built-in. If you're looking to set up Print to Go, we've got great guide for you. If you're only looking to update the PC app, the link is below.