congrats! so your main balance is safe 
it seems, when you made last sendings the change was sent to another random address, so your previous backup doesn't know about that. Try to restore wallet.dat from tha date after 8 Dec, in this case you will see your actual balance of 2k.
it seems, when you made last sendings the change was sent to another random address, so your previous backup doesn't know about that. Try to restore wallet.dat from tha date after 8 Dec, in this case you will see your actual balance of 2k.
Thanks for the answers ... A doubt that maybe you can answer me ...
As I said earlier I installed a new wallet on another computer and synchronized where my balance appears with the balance of only 0.0189 being that this wallet is a backup of my original wallet which should have 2,036 Rads ...
I have tried to insert backups of several dates after 08/12 and always open only with this incorrect balance. Follow the link to better visualize the problem https://ibb.co/eLRhGw
So you need to find the backup with XhbsCpZcgMDmiME9PPn6E6aCRDuo6MtJZK address, try to use your first old backups before 8 Dec also. The most safe approach to reinstall your current wallet with wrong chain. After deleting all files in %appdata%/Radium except your current wallet.dat and full resyncing you must see your 2k there. Try to reinstall using last 1.4.7.1.exe.
PS: actually, I suppose you need to do following: restart your wallet to release you last stake, don't start staking and do the buckup after restart. After that restore this last backup on your new comp, you mast see 2k there, after that send your 2k to the current address and use your current wallet.