Answer to my own questions:
1/ node list here: https://chainz.cryptoid.info/mue-old/#!network
2/ just copying the wallet.dat in the working folder of the client will do it

Edit:

I found the cause of the mess. The old and new wallets are actually conflicting. Their "work" directory (The directory were the blockchain data and wallet data, etc. is stored) is set in the windows registry here:
Computer\HKEY_USERS\<Your Key>\Software\MonetaryUnit\MonetaryUnit-Qt\
in strDataDir

Both the old and new wallet are looking up the reg path stored here. So if you run the new wallet on a PC with the old wallet installed and running or vice verca they will overwrite eachother's data. !!Warning!! This is including your wallet data, so if you don't back it up, you have all chances to loose coins by running old an new wallets on the same PC.

Since I had to use my gmail address, I prefer not to write it here for privacy reasons.
I registered with yet another email address and finally didn't get kicked out the space. I'm talking to the bot.

I just installed the latest version of MUE (August) on the PC and generated a new receiving address.
I re-launched the old wallet (1.0.10.8 64bits from February or March this year) and its data got completely overwritten by the new wallet. And the only way for me to launch it is to reset it, as suggested by the UI (and it does a reset on the same folder of the new wallet, so I don't have access to the info of my old wallet any more right now (I think I saved a wallet.dat file of the old wallet, so I hope I can use that). Plus the reset doesn't ask for a path and resets itself on the new wallet data (so when I will launch the new wallet, the same mess is gonna restart all over again).

Guys, this is messed up. If you develop a new wallet, at least you have to use different paths so the 2 wallets can be used together for transition purpose....

And... it's getting worse:
1/ My old wallet now without my addresses or any blockchain, is not finding connection to the old network.
2/ In the old wallet UI, I don't find how to import a wallet.dat file so that I can at least find again my old holding addresses.

How do I get out that mess?

Please explain in details as I have big amount of money in MUE stuck.

Best regards

Hello,

Following this advice here: http://forum.mymue.com/topic/49/stage-2-swap-old-mue-for-new-mue
I tried to join your slack apce, but nothing works (it's the first time I fail joining a slack space, there must be something wrong with your settings)
Two different problems in a raw:
1/ I couldn't register with any of my usual email address (based on domain names I own, that works everywhere else)
2/ So I finally use my gmail address. I could register and get in for a few seconds but even before I could dialog with the swap bot, I got automatically logged out the whole mueslack space and can't get back in with the message "You recently tried to sign in to MonetaryUnit, but it looks like your account for that workspace is deactivated. We're sorry about that! If you think this was a mistake, please contact a Workspace Administrator to reactivate the account."

So now I still don't know how to convert my old MUE coins.
Could you write a FAQ so I don't need to talk to that bot?

Thanks.

OK it worked with those nodes. You may wanna update the front page with those?

Hello,

Just installed the DigiByte wallet for Windows v4.0.3.0-g354c0f3-DigiSpeed (64-bit), but it doesn't sync. It stays stuck at "No block source available". I manually added nodes (the IPs provided in the 1st page of this thread) but still no success.
It's the first time I download an altcoin wallet that doesn't sync right away. What's going on?

Just started to use the FlutterShare feature. I hope the modest contribution will help. Thanks for the good work continuation!

Interested.

Here is mine
Amount: BTC0.001
Transaction: a4c0c53f8c4bc7eb7903212d51e88558af4d2aee4cf2799a0ae218217e6fc8b0
Good luck!

Another opinion:
40% BTC, it's the most proven system, but has drawbacks
30% PPC, it's arguable the most innovative altcoin with lots of improvement, the biggest being that it doesn't use computer power. See bitcarbon.
20% NMC
10% FRC or ZET or SBC or a mix of those or anything small cap altcoin that you think brings something clear over the others.

(You will notice I didn' put LTC in the portfolio. This is for diversification purpose. LTC is too close to BTC technologically-wise. Basically the same thing just 4 times faster, which is of no use, for now)

Have fun investing!