Hotbar is as it name implies a toolbar that is normally installed (bundled) with other software, you want a free program and it has stuff bundled which they get paid for. This is normally installed with the complicity of the user, albeit a checkbox option pre-selected that is missed or overlooked when you install the main program.
Mostly this monitors your on-line activity to deliver targeted adverts, pretty much benign, but unwanted.
In all honesty I would get rid of hitman pro as it can seriously mess up your computer. MalwareBytes AntiMalware (MBAM) should also be able to fine and remove these and isn't so aggressive.