I used the nodes from the OP.
And I'm sorry if I'm asking a question that's been already answered, I tried to scroll through the thread , but it's so full of annoying pictures...
sorry for the pictures, maybe i crossed some line, regarding the amound of pictures, i have to confess.
Though i love it, i will try so keep this in a reasonable amount in future. 
to your problem, sounds you have some database incompatibility,
here is a workaround, that should do the job:
1) please backup your wallet.dat somewhere else
2) delete EVERYTHING INCLUDING wallet.dat from you data folder
3) reinstall the current version of our wallet
4) place this Bootstrap in your data folder:
http://www.europecoin.eu.org/europecoin-wallet-download/category/1-europecoin-wallet
5) start the wallet and wait till sync is done (a new wallet.dat is created)
6) import your previous wallet.dat, pray it was an incompatibility and not a corrupted wallet.dat
7) if import doesnt work, try to simply shut down the wallet and to replace the wallet.dat and start again
hope that helped
keep me up to date
Matthias.
Better still, after backing up your present wallet, run
dumpprivkey <ERCaddress>
in your wallet console or
europecoind dumpprivkey <ERCaddress>
on terminal/command prompt (in the proper directory, i.e. where europecoind[.exe] resides) for EACH ERC address you own.
Take note of the privkey and then proceed with the upgrade as Mathias said. After full sync, you can just import your old address(es) in the new wallet using
importprivkey <ERCprivkey> [label]
in your wallet console or
europecoind importprivkey <ERCprivkey> [label]
on terminal/command prompt (in the proper directory, i.e. where europecoind[.exe] resides) for EACH ERC address you exported private key(s).
