An issue has been discovered in the Sage BusinessWorks 2021.0 release. We have paused the download until the issue is corrected, and the updated version should available for download later today or tomorrow
Yes it is OK to use the software. Please note that when printing forms such as Invoices, Sales Orders, Checks the addresses will not display. We are working on getting it resolved as soon as possible. If you need to get a form out with the address on it please see article 106939 Addresses not printing on forms after upgrading to Sage BusinessWorks 2021 for a workaround.