ReadyCloud App

Yes I've checked that, and even turned the firewall and virus checker off. No effect.

I would like to describe the problem in more detail:

On windows 10: It says in the ReadyCloud window: "Get the ReadyCloud App for Backup and sync". I click it, and it starts the Wizard. When installation is done, I see the ReadyCloud App window in the lower right corner. It connects with my NAS 214, and I can see my folders in it. I can click into it once (for example to snyc one folder), but then the app immediately diappears and is nowhere to be found. I can find the ReadyCloud App in the program tray, but clicking it to restart it gives no reaction whatsoever. Usually the PC goes static and I have to do a cold PC restart by turning power off and back on. Even Ctrl-Alt-Delete does not give back control.

After a restart of the PC, I can again install the ReadyCloud App once again (the wizard first deinstalls it, then reinstalls it), and I have ONE new chance to click into it once only. Then it disappears again just as before. Surely this behavior isn't normal? 

On my MacBook Pro with OS X Version 10.10.5 : I can install the ReadyCloud App. No error messages appear. But, after installation (which is signalled as "successful") there is no program icon in the Launchpad, nor anywhere else. I simply can't find this elusive ReadyCoud App on my Mac anywhere.