First of all, make sure you are using Firefox as your browser as Firefox is the recommended browser for all ScanPower products. 

To refresh your browser click the REFRESH button your browser toolbar.  It looks like this:

You can also use the following keyboard commands:

Control+R (Command+R on a mac) will refresh the page.

Control+Shift+R (Command+Shift+R on a mac) will clear the cache and then refresh the page.