v9 feature
About Let's Encrypt: It is a certificate authority that provides certificates (only domain-validated certificates) for free. (for more info : https://letsencrypt.org/how-it-works/)
With this plugin you are able to create a java key store file (the .JKS file) authorized by the Let's Encrypt certificate authority.
Domains : Multiple domains should be separated with comma.
Keystore: Set the location of the jks file, and the name also should be specified.
Challenge Path : Must set the WebInterface folder from the CrushFTP install folder.
Cacert Key: Java default system keystore (cacerts) the default password for it - changeit
Staging flag: It is for test mode. If the is true it will only generate a dummy jks, not a valid one.
If the all fields are ready hit the submit, and the jks will be created on the Keystore location.