piczo

hi i have a website from www.piczo.com. I used to own a PC and then i switched to a macbook and now i cant edit my website! i tried editing it from 3 other PC's and i could do it on those (now u are going to say 'well why dont you just use the PC's then?' and now im going to say 'i cant bcuz none of them were mine they were friends'

This is the notice that comes:

It appears the the correct version of the page did not load, which may disable certain editing functionality. Please right-click in the page background and click Refresh. Contact the help desk for assistance.

I refreshed by right-clicking and by clicking the button at the top of the window. Now what???