just a quicky question, well dunno if quicky but I`m curious

now that the new Blight cleint is ready for patching, if I patch to it, will I no longer be able to duel log on the same computer? since the launcher will automatically clear the cache?
if so, how would I go about fixing this issue? as I often enjoy logging multiple characters on for roleplay, and sometimes play on one character on say Chaos, while also roleplaying another on Order. so I take it unless I use another computer for a second character log in, I will no longer be able to? or can I simply download a second launcher in another spot? I`m not exactly computer savy here so forgive me for my dumbness XD