June 2011 Yes you can play Club Penguin if your membership runs out, but you can't use you upgraded igloo or get other member items out of store. You do keep your puffles and can use them, however you aren't able to get more or replace them if they run back to the wild. If you buy membership again you get all your Items back.
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A 'SWF' is a flash-file. Flash is the program that runs Club Penguin. If you decompile Club Penguin, you'll find SWF-files, like rooms and catalogs.
yes
buy another
yes you do!
Only the free items, the member items are still in your inventory but you can't wear them until you re-new your membership.
The timer mentioned is how long you are a member. When it runs out, you are no longer a member, but can still partake in non-membership activities.
yes
two weeks
No It Is Safe But Sometimes Club Penguin Runs Slow. If It Does Press The '+' And It Makes It Faster But The Graphics Are Very Low And Make The Penguins Look Strange.
no. you lose your house and all your clothes
yes