I see that the switch simply removes the total users count, my problem is that if I remove the code that displays the link manually, I lose that functionality in ALL instances of the module,, The option to NOT display the 'View All members' link should be switchable, not permanently removed from EVERY instance. The Link is not required in the online users module, but must still be enabled on the top and most active user instances. If I'm not mistaken, removing the code suggested would indeed disable the link globally?
Thanks again for your time Dimas, The above suggestion seems to have removed the link from the module. I'll give it a full check over today to see if all other modules behave as expected. I'm sure they will be okay though. Your efforts are very much appreciated.
Just to let you know, that when I updated the core to 4.2.6 the aforementioned fix was overwritten, however I've applied it again from these messages and all is well. Thanks again Dimas.