To help you, we must have a bit more information on your installation. First you should not have to change the include path (the two last lines in https://i.imgsafe.org/b294467da6.png that you added are in fact equivalent to lines 2 and 3, except if you have a broken installation of Eclipse/System Workbench).
First of all what is your environment (Windows, Linux, MacOS, which version?) and the Java version installed (JRE, JDK, which version?); then why did you install the hard way (manually installing Eclipse and System Workbench, furthemore using a non-official installation guide instead of the official one at Installing System Workbench for STM32) rather than downloading the installer and using it?
Did you update your installation? (Help >> Check for updates)? A new version was just released.
Finally, for your last problem, you should provide us with the content of the “Console” view on the bottom of the screen; it’s usually the window that provides the most detailed information on errors.