Glad you got it resolved.

I actually think I had the same error as you when I initially tried to recover my funds, but I tried again and it didn't happen the second time - seems yours wasn't so simple!

Ok I figured it out. For the benefit of others - As far as I can tell, BitSharesX were renamed to just BitShares, so they are effectively the same thing.

Further complicating things, Bitshares 1.0 (which is what BitSharesX became) was upgraded to BitShares 2.0 and Wallet files are incompatible - looks like it is a whole new blockchain in fact.

My issue was that my backups were from 0.4.27.2 which is incompatible with the last version of the original BitShares 0.9.3.c.

So first, I had to download 0.4.27.2, import my wallet files, then install 0.9.3c on top.

Within 0.9.3c, I then had to export my private keys using the console command wallet_export_keys (see http://docs.bitshares.eu/bitshares/migration/howto-exporting-wallet.html#bitshares-1-0-full-client)

This then gave me a json file of my keys which I could import into the new Bitshares 2.0 client, via the settings menu.

Once imported, I then had to "reclaim" my old BTS1.0, again through the settings menu.

Finally, I can see my original holding.

Hope this helps someone.

Quick note to say I used your demo wallet and wanted to say thank you.

For others, it says that it will charge a fee of 10000 to send the 0.2 BTSX, this is incorrect, the fee is only 0.1. I was a bit worried for a sec!