If the app will not start, likely the MSVC Redists are not installed or the CPU is not whitelisted. See: Windows OS Software Requirements:
nvcuda.dll error: Either GPU is not installed or you don't have one, if you don't an Nvidia GPU you may have installed the MX version instead of the RX server version. See: CD2 Cinedeck Server Installation
If after Cinedeck server software launch via remote, you can't see the software or only a white window appears, you need to attach a monitor or use a virtual monitor emulator.
To reset Cinedeck Client UI to default state:
Close Client app
Remove folder C:\Users\<user>\AppData\Roaming\Cinedeck Client2
.Open Client app
If you need to remove or backup your presets they are found in C:\Users\User\Documents\Cinedeck Client\presets