Introducing Dokany (Windows) and FUSE (macOS, Linux) support. Vaults can now be mounted via Dokany and FUSE which is now the preferred way over WebDAV. Expect vastly improved integration into the system. A complete list of closed issues is available here.
Super, Thank you. Devs.
Works good on my Linux OS desktop and the Java version works great on my laptop as well.:smiley 
To keep it short: Not in the near future.
Our focus is on the GUI-application, the cli project is mostly user driven. If a main developer has some spare time or if there is a pull request from the community, it can be updated, but currently there is nothing planned.
Any plans to upgrade the IOS APP
Actually in Linux if to try add existing folder - it is not possible. It opens the folder and then demands name which actually was the folder I typed but as it existed, it opened. When I type again same name then it creates folder with same name into existing folder which I did not want. I just wanted to add existing folder. Only way is to create folder during vault adding process and if such folder existed, rename it before adding vault.
Why not just allow to pick up existing folder and add it?
Noticed from introductory video where in macOS the given name folder was created inside Dropbox folder. So I need to log off from Dropbox, rename the ~/Dropbox folder to something else, create vault and during that vault creation the folder ~/Dropbox and then finalize the data moving from old Dropbox folder to vault. I need also clear Dropbox folder in web interface during I am logged off in computer client - otherwise after logging in computer client, Dropbox starts to sync files back from server to computer as it sees empty ~/Dropbox folder in computer. After adding encrypted files, Dropbox will sync them to its server.
Unfortunately I receive the following error, when I try to download the version for Windows (64-bit):
Beim Verbinden mit d29vzk4ow07wi7.cloudfront.net trat ein Fehler auf.
Sichere Kommunikation mit der Gegenstelle ist nicht möglich: Keine gemeinsamen Verschlüsselungsalgorithmen.
Fehlercode: SSL_ERROR_NO_CYPHER_OVERLAP
Yes - we really like a SEARCH function in the editor - or the option to select an editor by choice!