Lost multisig after updated from Electrum 2.3 to 2.6 in Windows 7

[atpmove]

I had a 2 of 3 multisig and tested them successfully years ago when I installed Electrum 2.3 for windows. That is, I have to use 2 wallet to co-sign a spending.

But tonight I updated to 2.6.4. Then when I tried to send BTC, there is no co-sign button. And once I entered the password. The BTC just went out successfully and received successfully by designated address.

How to make my Electrum multisig again?

[OmegaStarScream]

I had a 2 of 3 multisig and tested them successfully years ago when I installed Electrum 2.3 for windows. That is, I have to use 2 wallet to co-sign a spending.

But tonight I updated to 2.6.4. Then when I tried to send BTC, there is no co-sign button. And once I entered the password. The BTC just went out successfully and received successfully by designated address.

How to make my Electrum multisig again?

I assume you restored using your seed ? I guess that's what took off the multi-signature (I know this what happens when you are using 2FA)
Just make another new wallet and you should be fine .

[atpmove]

OmegaStarScream, thank you for your kind reply. But I did not restore using seed. I simply installed the electrum-2.6.4-setup.exe on the same PC that I was using Electrum 2.3 Multisig. Then the multisig disappeared (I no more need co-sign to send out BTC). This worries me, because it seems a multisig Electrum wallet can lost Multisig by installing new windows setup file.

Secondly, you mean make a new multisig wallet with new private key and transfer my BTC to new wallet?

[OmegaStarScream]

I assume that while installing the new version ,the files got installed over the old ones which caused that then.
What I meant is to delete everything (including the AppData folder of Electrum) (make sure you store your Bitcoins somewhere safe first) and then Install the latest version of Electrum again and set up a new multi-signature wallet .