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to rename them, if you can see the file extention, then simply rename the end after the ".", if you cannot see the file extention, go to folder options, view, uncheck the box that says hide extentions for known file types, you will be able to see the extention and rename them afterwards, although i would highly suggest just using the allin1 tool or the galaxy editor to open the sc2map files until the publishing feature is released.
to rename them, if you can see the file extention, then simply rename the end after the ".", if you cannot see the file extention, go to folder options, view, uncheck the box that says hide extentions for known file types, you will be able to see the extention and rename them afterwards, although i would highly suggest just using the allin1 tool or the galaxy editor to open the sc2map files until the publishing feature is released.