Hi Jim,
Thanks for your answer, I'm on 0.5.19 and I've been using it since it came out.
Before it I was using 0.5.18 and that wallet has been in use since a couple of years ago with daily movements.
So why is it still using the old format?
Isn't it enough to open it with 0.5.19 to have it converted to the new format?
Does its size, 68 megabytes, pose any problem in handling it?
Thanks
spiccioli
The very early versions of MultiBit (up to 2012 I think) used a different format for the wallet (Java serialisation rather than protobuf).
Only the protobuf version is supported now.
For a while the old versions were read in and converted to protobuf when written out so that users that updated via each version would not have noticed.
The old versions are still available on the multibit.org website if you have deleted the older version you can reinstall it.
Probably the best thing to do is:
+ using the old version of MultiBit Classic, empty the wallet to somewhere else.
+ install the latest version of Classic (or try out MultiBit HD) and create a new wallet.
Very old versions of MultiBit Classic don't even connect to the Bitcoin network any more (as things have changed over the years). In this case then:
+ Export your private keys.
+ Use the most recent versio of Classic and import them. Or import them to blockchain.info using the help article on how to do this.