Sorry for the trouble positing.
I would suggest uninstalling and reinstalling. Since it is a school computer, are there multiple accounts? When you install, do so with the Administrator account and be sure to choose the option “Install for All Users”. Then update to 6.0.7.
If you still have trouble seeing HSSE or updating to 6.0.7, I would suggest contacting technical support through your MySteinberg account for more direct help.