LibreCAD latest version is coexisting with earlier version

Hi Team,
During the latest version 2.2.1.5 which is released few days ago, this release resolved the earlier issues, but this release is coexisting with the last version. When I try to install 2.2.1.5 on top of 2.2.1.2 in that case both version is co-existing. Is this a bug or this is an expected behavior. Your reply will help us to take appropriate action.
Thanks and regards
Team Meta