2010 Peachtree accounting will not email invoices

I have 2010 Peachtree Accounting. Periodically it refuses to email invoices. error message that there is a missing or corrupt file, reinstall or call support. This has been problem over the years. I always uninstalled and reinstalled dozens of time until it fit correctly. Then run great for years. . ...any ideas?

will my backup data convert to run on 2011 Peachtree accounting?