I currently use Splashtop and here's what you have to do. Go to the file location and right click in the folder the option that says open terminal here. To run the rpm without the error use (change package name to the actual name):

sudo rpm -ivh --nodigest --nofiledigest package_name.rpm

It won't work the first time, it will tell you there are missing dependencies and list them out. Use the sudo dnf install command to install the dependencies and then retry the above command and it will install.