Incompatible with the current KeePass version

Hi,
I tried to setup Smartftp with KeePass, but it keeps saying that the plugin is incompatible with the current version..
My KeePass version is 2.18.
I hope you can help me.

I have installed the keepassrest plugin from the link you gave, but it keeps saying that the plugin is compatible with the current keepass version.

It turned out that Windows only comes with the client instead of the full profile of the .NET framework. The full profile can be installed from here:
.NET 4.6.2