I have used Songwriter 2010 for Mac since 2011, but recently when I open music sheets that I have printed earlier they are don't reed in the right way. Songwriter seems to merge two measures in to one and change some other things. I wonder if Songwriter docent work with OS X Mojave? When I try to update they say that you have no product register. Does some one know what to do?

What product is similar to Songwriter today? I find Finale v 26 but that's quite expansive for my purpose. If Songwriter fulfilled my need, what's the most appropriate today?