Hi Karo, welcome to the forum
To add to what Preemptive has posted above, here's where you can get the Novacom drivers, which you will need to install in order to connect WebOS Quick Install to your phone:
Scroll down and you will see the links. If you're on Windows, when you download the driver package, use 7-zip to open the file and another file inside it. Then you'll see the actual installer inside the second file, which will set up Novacom on your computer. The good news is you'll only need to do this once.
Once you do that, WOSQI should work and you'll be able to download Preware, and with that, install most apps and patches without having to connect to a computer