Not that I can figure out. The only option from Add/Remove Programs is to uninstall or repair Office 2016 as a whole.

I considered uninstalling completely and trying to install everything except Excel 2016... but this isn't the final result I would like. Excel 2016 has some awesome new formulas that I already use.. that don't work when opened in 2010. And I figured installing Excel 2016 would eventually just take over the default again anyway.