From 32 bit to 64 bit

The BerkeleyDb databases are not compatible between x86 and x86_64.
You have to dump the database to textfile on the original project, and create a new database by loading the dump-file on the new project.
Execute the first pass of reload.sh on the original project.
Copy the dumpfile, $pwrp_db/'volumename'.wb_dmp, to the new project.
Execute reload.sh in the new project and start from the 'renamedb' pass.