As you see below, there is a sudden jump from year 2000 to 2009. First I deleted the 3 demo-pairs, switched to 1H mode and then went to a random date. After this I inserted Moving average(200).
Also the window to the left, showing downloaded currencies, only shows one currency pair, but there should be more than 10. For a week ago, I downloaded a handfull currencies from Histdata.com, which did show in the currency window - but without Forex.com. I switched back to Forex.com a few days ago, and Histdata.com does not show.
Unfortunately I have no real clue why this could be so.
Though I am afraid this is not much of a help to you, I hope it does give some insight in what could be wrong.
Ps: Keep up your good work!