I'm sorry, mate but, the interface and whether one likes it or not is not relevant. What is important is functionality, protection & security... none of which is what it should be by running old, out of date versions! You cannot fight new threats w/ obsolete definitions. It is not a matter of what something looks like but, how well it can work.
And the latest version of Malwarebytes will & does work on Windows 7 Home Premium.