Saving the GC graphs locally to your computer is not enabled in the Gearing Commander Online Version !
However it is enabled in the Stand Alone Version and available for all Site Supporters. As it were the site supporters donations that made it possible to buy the graphical chart software license, only the site supporters are entitled to this advantage.
If you also want to save
these graphs to your computer, consider becoming a site supporter
More info on becoming a site
supporter and its advantages: