Rather than copy the entire blockchain into multiple folders...
If you just want a new address, go to file -> receiving addresses -> new
If for some reason you need to keep them separate, rename the wallet.dat file something like wallet_old.dat, etc. It should rescan the blockchain if it finds the wallet.dat file has changed (or create a brand new one if its missing)
Just be sure to close the wallet
before touching the wallet.dat file
The help file above didn't help me much actually. how do I install all of the files to one directory. Its still installing the wallet on users/username/appdata/Dash ?? I want to have multiple wallets obviously with their own .dat files.