I don't know how I did it, but I often suffer from a tumor or forget about it. I find myself with the files of the wallet darkraven 3000 xrd to those who help me please either Italian or German or a brsvo s cspire goggle
First, you should express your issues better, in better English I meant.
I have some hints for you:
(1) Go to coinmarketcap.com or Google to search for topic of your coin (Dark Raven, for instance) in order to get link to its newest wallet version.
I can not find it on CMC (maybe it has not listed there), from Google Search, I found something, but not sure they are what you need.
(2) Download the latest wallet version.
(3) Install that wallet to your computer (it mostly installed in the same directory with oldest version if you choose default option for directory).
(4) Open it again, then you will all done (let your wallet some minutes / hours to sync).
However, remember that if your old wallet.dat encrypted, you have to type password to fully access it (send coins, for example) after install and open it.
If you can not remember password, all your coins in that wallet.dat gone.
Good luck.