Looks like it can't actually do a bulk transfer of SMS from phone to
PC though?

Quote from their website...

Messages section represents all messages (SMS, Smart SMS, MMS, E-mail
and others) stored in your phone. This section allows you to read
Inbox, Outbox, Drafts, Sent, My folders, Mailbox folders content,
display basic message types - SMS, MMS, E-mail, Beamed (received via
BT or IrDA), BIO (Picture message, Operator Logo, Ringing tone, WAP
access point), read and display file attaches for MMS, E-mail and
Beamed messages. It also can create and delete custom message folders,
delete messages from your phone and move them between folders. You
also will be able to create and send both plain and Unicode SMS
messages to individual recipients as well as to contact groups.