I am considering starting to use Boxcryptor, but have one question that is not clear to me from the FAQ. I have an existing folder on my Windows PC which is synced to Google Drive using the Google Backup & Sync client. When I install Boxcyptor, will it attempt to encrypt this entire folder? What I want to happen is for most of the folder to remain unencrypted, and just a few new sub-folders that I will add to be encrypted.