Adobe has announced the release of Lightroom update version 6.14. This will be the last release of the perpetual version of the app. The new version adds new camera and lens support and fixes some bugs, but does not add any new features. In future, Adobe recommends that photographers convert their files to DNG if support for forthcoming cameras is not available.
In order to avoid confusion with updates to Lightroom CC, Adobe recommends following the instructions on this page to update Lightroom 6.