I can restore the old wallets. The only thing is: the coins are not on the old wallets. So it helps not so much. If i had a seed from the wallet the coins are on, I think my problem where not so big. The coins are on "default_wallet" and "wallet01". Both are "nur lesen". I dont know how I managed to creat them. I think they where not ready createt, so there never was a seed. If anybody can answer in german i think i can explain it better. I needed a wallet to receive coins quickly. I installed electrum, copied the adress to receive and gave it to the sender. Thats it. Now my coins are on this fucking "read only" wallets which i never wanted. I am confused caus i can see the coins in this wallets, so i think they MUST be anywhere!?

btw:
I can´t believe that my coins are lost, cause i can see it in this fucking wallet. They must be anywhere. Is it possible to send it back to the sender? Is it possible for the sender to call it back ? It is not a illegal transaction, so i can talk to the sender in any way if it helps.

Ok, perhaps this is a trace. I lost the hard drive of my mac. I inserted a new one and installed yosemite. Then i tried to revover the old HD with file recovery and there where some files of electrum. So i tried to recover electrum, which does not work and I installed new electrum and when it asked wether to create new wallet or recover one I guess I tried to recover. It seems this wouldn´t work. There are not so many files that I could recover. Which one can help me to get my coins back?

Sorry for my bad english.
When i look into the file "default_wallet" it is a "wallet_type": "xpub"

The option "private key" is grey, just like "seed" and "password". I installed electrum in hurry and used the adress to receive btc. I think there never was a seed. It´s the default wallet. What can i do?

I built a "read only" wallet by mistake. On this wallet are some bitcoins. How can I get it back?