Includes DB changes you need to log all terminals out during upgrade

This version includes a repair for 5.1 to 5.2 install. If v5.2 install fails, the messenger gets locked. Upgrading to this version unwedges that

This version (and in 5.2) includes changes to messenger to make it's unattended upgrade function work better. Unattended upgrade is supposed to trigger an automatic install on messenger computer if messenger computer isn't in use. It can go haywire in some circumstances. This version tweaks the logic a bit : wait until DB is fully upgraded before attempting to do an automatic update. Should minimise messenger going haywire significantly.

5.2.8 changes only

• Edit txn would not work on some txns created in v4 or v5 (bills and invoices). Should be okay now.