Are you referring to the tax program or the tax planner?
Tax Planner > Help > About > Latest version is 40.0514 (i.e. last updated 5/14/2020)

If you are somehow seeing DEMO version or either, check your prep file. https://proconnect.intuit.com/community/tax-return/help/how-to-download-and-install-lacerte-prep-fil...