Quit PowerPoint (Cmd-Q) and open it again. The KPT Style Basic tab appears after the View tab.
Select some objects, pick a palette in Themes; or select shapes and click Scale by %. Buttons with a lock are part of KPT Style ADVANCED: clicking one tells you what it does.
To remove it, open /Library/Application Support/KPT/KPT Style Basic/ and double-click Uninstall KPT Style Basic.command.
If the tab does not appear, the installer's log is /tmp/kpt-style-basic-install.log.