shared computer access

good morning I can't access the second pc with hamachi by opening the program it doesn't see the main pc or the second pc connected to the network all the pc that I have shared are not detected I can only see the names of the shared pc but I can't connect I tried to uninstall the program but I didn't solve anything now it tells me that the installed devices are 5 when in reality they are 3 how can I delete the old unused devices and why can't I connect anymore thanks