Please note that the actual plugin name for SP V5 has been changed from ‘simple-forum’ to ‘simple-press’. If you are upgrading from version 4.4.5 you will need to deactivate 4.4.5 (NOT uninstall) and completely remove the current plugin folder and files. Upload the SP V5 plugin in the normal way and re-activate it to perform the upgrade.

Do the instructions for upgrading from 4.4.5 apply to 4.5.1?  Is deactivation and removal of current plugin folders and files required?

Thanks,Nick