Discovery list much shorter within the console


For various reasons I installed a fresh new setup of IP-Symcon (on a windows machine). After the installation the Symcon Console showed me a very long list of Discovery services. I was enthusiastic to see such a long list but continued with other things. Later on I wanted to install more Discovery services (right click on the ‚Discovery Instances‘ categorie → Add Object → Instance… The list I am getting now is a lot shorter (about 25%) of the list during the installation. How do I get the the long list off Discovery services again?