To play on gameflare you must install gameload but I don't know how to make a fresh file. When I refresh the page, it constant returns to the previous save.

Also wondering this.

In case anyone is still wondering how to do this, there is a file under This PC > Users > (Your User) > AppData > Roaming > Unity > Web Player Prefs > Games1_2e85 play_2ecom (Should be the source of the game) > prefgames-lego_2dninjago.... Just delete that file at the end and the progress should be cleared when you go back in the game. However, this is location the for the source found in flashpoint, it may be different for other sources.