Hello, 
I've been using PC Monitor since 5 computers could be monitored for free and this has served me well. PC Monitor is really great. 
I intend to replace 1 of them since I got my sister a new computer, but I'm not sure I will be be able to add the new machine once I remove 1 of the 5 in use. 
Will the new 3 machines limit be applied or old users still get 5? 
By the way, I would like to suggest a "light" subscription of up to 7 or 8 machines. That would cover most of the tech guys family needs (wife, sons/daughters, brothers/sisters, parents..) 
Regards, 
Gilson