Unable to upgrade from concrete5.4.2.2

Permalink
Machighway support cant't seem to help me decipher the instructions on this pagehttp://www.concrete5.org/documentation/how-tos/developers/update-ve...
which they sent me. My site is down due to an incompatibility with the version of concrete5 that I am using - 5.4.2.2. I can't get to the Dashboard. Can someone please, in plain and simple steps, tell me how to move forward and get my site back up. I am using cPanel X. Thank you!

 

This website stores cookies on your computer. These cookies are used to improve your website experience and provide more personalized services to you, both on this website and through other media. To find out more about the cookies we use, see our Privacy Policy.