If you have a subscription for Microsoft 365 Apps for enterprise, you have access to Power Map for Excel as part of the self-service business intelligence tools. Whenever any new Power Map features and performance enhancements are released, you'll get them as part of your subscription plan.
If you have Office 2013 Professional Plus or a standalone version of Excel 2013, you can use Power Map Preview for Excel 2013, which is an unsupported add-in. The earlier version of the Power Map Preview is expired, and won't work with any version of Excel. If you installed the earlier version, uninstall it from Control Panel, then download and install the current version of the Power Map Preview. This version has the same functionality as the version of Power Map that was released with Microsoft 365 SP1.
Although feature and performance enhancements for Power Map will continue to be released for the Microsoft 365 subscription plans, there are no future plans to update the downloadable Power Map Preview.