Ohhh my bad. Each language is using they own resource file and the changes in EN version doesn't reflect other languages GUI. So the same change must be done for every language not only for the EN.
I will post a new pull request in GitHub and try to fix them.
Uninstalling an EXEMSI installation remotely with no GUI is not possible as the .msi uninstall command will just start the unins000.exe user interface. so any commands for remote uninstall will fail
like those examples: ---- MsiExec.exe /X BD73903D-C694-4358-8F07-E71ABC89368F msiexec.exe /x ...
The previous native MSI installer from "UltraVNC_1436_X64" was better and signed.
The new UltraVNC - UNREGISTERED - Wrapped using MSI Wrapper from www.exemsi.com 1.6.4.0 is worst without signature.
I can confirm that the UltraVNC_1435_X64.msi installer doesn't register uvnc_service as service.
The "UltraVNC_1435_X64_Setup.exe" is working fine but not the .msi package.
When the connection is over VPN with improperly configured MTU and MSS it also can cause gray screen. To test this you can use Wireshark and inspect the traffic for drop packets because of DF bit. Only for the test you can restrict the PMTU on both client/server which will limit the packet size to ...