My wallet is over 50MB and on Windows wallet I couldn't run it, always crashing.
I have tried to install virtual machine with ubuntu and launch Linux wallet, then copy blockchain from alst year, sync and now it is working / staking as well.
So Linux Wallet is working. I recommend to use it.

It is not a solution, but so far ...

If anybody can fix a Windows wallet it would be really great.

There were suggested some millions of JPC for Fix. Then let's get JPC back to some Exchange.