After deleting and reinstalling TT a couple of time with no better results, I tried a more complete delete and it helped some. I used AppCleaner (I am sure there are other such apps) to get rid not only of TT but also the various files it had disseminated in the library etc.
After reinstalling, I could finally reopen the program and I managed to e-file the federal return. I could not e-file the state return and for that needed help from a TT help person.
The technical support of TT is definitely substandard. They explicitly told me I did not need to delete the previous copy of TT, just install a new one. The best they can do is send you to links that do not relate to the issue.
