The Office 2013 Fix for Act! are two plugins which will allow you to use Microsoft Word 2013, Excel 2013, and Outlook 2013 with any version of Act! which supports Office 2010, which includes ACT! 2011, ACT! 2012 or ACT! 2013. Install the plugins, and go to your preferences to select Microsoft Word as your word processor and Outlook as your email client.
This bundle saves you over $200+ PC in upgrades. Upgrade Act! for a different reason instead of Office compatibility.