Reconstruct a downgrade?

[Charles Bradshaw]

I'm trying to move my cyrus imap from Fedora 17 to Centos 6.5,
unfortunately the package versions of cyrus-imapd appear to be a
downgrade from version 2.4 to 2.3

I have copied /var/lib/imap and /var/spool/imap and the necessary /etc/.. conf files

cyrus-imapd appears to run correctly and I can connect a client (Evolution).
The clients mailboxes appear, but Evolution throws this error:
 "IMAP command failed: Mailbox has an invalid format"
And /var/log/maillog has this messages:
...
Apr 14 16:03:55 dell2600-1 imaps[3058]: fetching user_deny.db entry for 'xxx at my.domain.com'
Apr 14 16:04:10 dell2600-1 imaps[3058]: Future index version: my.domain.com!user.xxx (12 > 10)
Apr 14 16:04:10 dell2600-1 imaps[3058]: fetching user_deny.db entry for 'xxx at my.domain.com'

After deleting cyrus.index, cyrus.header annd cyrus.cache from the user xxx at my.domain.com inbox directory 
and a reconstruct -r user/xxx at my.domain.com mail boxes and messages are restored successfully.

But there are now thousands of, presumably, previously deleted messages and the 'seen', 'replied' etc flags 
are gone!

Is there a way to reconstruct the necessary db files so that I don't loose the flags?

I tried a build from source of a later version but failed with dozens of compiler errors!

Thanks in advance, Charles Bradshaw