Update to FPD 3.9.2

With WP 4.9.8 I cannot update the FPD on the wordpress plug-in update. If I download the files from envato and I run the .zip files I receive the message: the destination directory already exists. /home/dstincti/public_html/wp-content/plugins/fancy-product-designer/ an the plug-in fails to install. 

I would like to use the standard automatic wordpress update mechanism What to do?

Thanks,