Just did the upgrade to 2016.1a (actually had to do it from the MapleSim side, but still). Works correctly now.

For those who have Maplesoft 2016.1: http://www.maplesoft.com/downloads/SelectPlatform.aspx?hash=4C068D86CAC6B5AEA03607CBCF97B9F7

For those who have MapleSim 2016.1: http://www.maplesoft.com/downloads/SelectPlatform.aspx?hash=45E898AE566A38EC63FF96D4104F82CA

If you have MapleSim, please note that you have to get the MapleSim update, not the Maplesoft update, as the MapleSim update updates both MapleSim AND Maplesoft. The Maplesoft-only update tells you that you need to get the MapleSim update instead. Either one works.

Thank you everyone who helped!