well, if your data is not recoverable, you would be screwed. you can make a backup copy of your wallet.dat file though, on a thumb drive or something.
in windows, its located in c:\users\(your user name)\AppData (which is hidden, you must select "show hidden files" from the organize menu)\Roaming\VERGE
in linux it's in ~/.VERGE/
and in mac, in the library folder called VERGE
as long as you have a copy of your wallet.dat file, you are ok if your pc crashes. you can download a new wallet on a new computer and copy your wallet.dat to the new wallet.
or as the user above stated, there is a recovery phrase (a few words) if you use the android wallet, because your coins are stored in the blockchain, and can be retrieved using the phrase.