Yes, the problem persisted after the host was rebooted. Oddly, the behaviour wasn't quite as simple as no keyboard input - it was actually behaving as if the Alt key was held down: for example, F brought up a File menu instead of entering an F in the focussed text box. (Pressing and releasing Alt on the client end made no difference.) No software that might interfere with keyboard input, though I was accessing the viewer machine via RDP.
Yes, issue still persisting on an updated install. Switching to RDP works better on the machine it's enabled on, so I'll be using that in future for most situations, but for freshly remote installed PCs I need to do some setup first, so still need the remote desktop to work occasionally :(
I've seen exactly this issue come up twice in the last week (running v 7.x viewer on Windows Server 2019): mouse works, keyboard ignored completely. Definitely not using Webroot anything (Bitdefender is our AV of choice).
Old post I know, but this is still the first search result here.
This is a major problem in remote usage when the dialog is positioned over some of the controls, as in the Windows login screen, since it prevents clicking the controls it's obscuring. Equally, on another laptop (an MS Surface) the dialog was positioned most of the way off-screen, and not draggable ... bug?
IMO, having the option to send the welcome message to a custom HTTPS URL instead of being SMTP only would be welcome. (For the paranoid various forms of HTTPS key/cert pinning would also be nice and probably not much extra effort?) Also useful since lower-end ISPs may block or interfere with SMTP traffic, particularly port 25: using 587 helps, but plain old HTTPS on port 443 would avoid that issue too.
Personally, the upgrade was a minor irritation - being a free user helps there I think, I just requested a new free licence since the old one wouldn't load. A bit of explanation and warning would have been nice, particularly for those who have to pay for the upgrade, and the way the Viewer hung for a minute (presumably while it downloaded the update, with no UI feedback?) wasn't great.