You have already started processing the payroll for the current pay period, before the new software update was released.
When you launch the application, you will receive the options Update Now or Later

The update notification message will recommend that all companies should be in a new processing pay period before updating the data.
The recommended selection:
Update Now:
Later:
CAUTION: If you selected to update your system, even though you have paid employees, and printed final reports and payslips, there is a risk that values can recalculate and might be different, and will require manual reconciliation and balancing of amounts.