How do I install Symbolic Toolbox (muPad) on my Mac (Version 8.5)

Hi all

I have a very cumbersome and extremely bothering problem, as I need to hand in a very important math paper this weekend.

I cannot get my MatLab to install my symbolic toolbox. I have a Mac running Yosemite and my University provided me with a link to the software. The problem is that the option to pick the toolbox upon initially installing the software does not even appear!!!!

Having once installed the software, I went to preferences->General->Help and chose "web only" and "show software that is not installed. When I chose "symbolic toolbox" the following error message appears:

"Your internet connection is no longer available.MATLAB has changed your Documentation Location Preference to use locally installed documentation. You can reset the preference to use WebDocumentation after your internet connection has been restored"

What the..... PLease somebody help me!

Thanks!

Kristin