Api Key for update Enfold theme not working

Good Morning, I bought an Enfold Theme last years, now my website had 4.2.6 version, but trying to enable auto-update feature, or manual one, I’m not able to see new versione avaible in Theme options (last version avaible is 4.7, that I correct find and download from my themeforest account).
I Generate and insert Api Key as showed in the guide, as requested for autoupdate or manual update, but no new version are checked.
Where is the problem??
Thanks.

Hi

pleaseccontact theme Author and let them know How to Contact your purchased theme Author, theme author will be happy to help.

Thanks