New release Multibit backup???

[Jochen]

Hi,

I just downloaded the new version of Multibit, but the backup doesn't seems to work..
I did the follow:
I got some backup's of my %appdata%/Roaming/Multibit map that i only use offline for safety.
If i open my pc i put the Multibit map back in the Roaming map and open multibit and he opens well in the 5.14 version.
If i download the 5.15 version and delete the 5.14 version in C:/Program files/Multibit 0.5.14 he just opens without my data.
I then choose open wallet=>Roaming/Multibit/Multibit.wallet but nothing shows up.
I normally dont backup my program files/Mulitibit because it always work if i re-download Multibit and put my Roaming/Multibit map back.
Can someone reply in a step by step explanation plz?

Thanks.