Just started hence neutral stars. I was going to write to the devs but I see you reply here. Open is good. I don't know what a filtered list is. That is my only confusion so far. I was interested in premium but put off by the monthly fee rather than a single license. Meanwhile I was playing with the idea of selling each premium feature separately. That would give you information about what your users want - especially after you add computer support. Feed the wolf you want, Linux 1st.