StartIsBack+ 1.7.5 is a specific update for Windows 8.1 released around March 2015. Its primary purpose was to enhance the desktop experience by reintroducing a fully functional Windows 7-style Start menu and button. Key Features in Version 1.7.5
Unlike many other Start menu replacements, StartIsBack+ is known for its deep architectural integration with Windows: startisback-plus-1-7-5
Are you looking to this specific version for a legacy Windows 8.1 system, or are you troubleshooting a compatibility issue? StartIsBack+ 1