Back-up wallet.dat

1. Go to:

    Win -> %appdata%/solaris/

You can do so by opening Explorer and typing that into the path field.

    Mac -> ~/Library/Application Support/Solaris/

To find the folder on Mac: 

Command+shift+g 

put: ~/Library/Application Support/Solaris 

then click GO

2. Copy wallet.dat to a safe place like a USB drive

That's it!

IF YOU ARE RUNNING MASTERNODE(S)

Also copy the masternode.conf file.

To restore:

Paste both files into the same folder on new PC.