From 0.1.x ? I haven't used that version, I did an upgrade from 0.7.2
Read the upgrading file, I used ./bin/installto.sh and worked like a charm.
But first when I started, first made some backup.
cp -pR ./<source to ./<dest> (the complete roundcube tree)
mysldump -u username -p password databasename > ./outputname.sql (mysql db backup)
Now you can run the installto.sh shell script and when that is done check if
everything is working and you properly need to update some plugins.
Grtz iNeo