Yes, you should. As a test, create an email address from your domain/hosting account,
email@example.com, for example. Don’t use
info@. Use the new email address instead of the one you’re using now, turn SMTP off and test.
Try a file replacement. Knowledge Base - Updating 3.2.x
Is your board a host provided one-click install? Do you have full control of your board such as FTP, phpMyAdin and cPanel? If you have access you should be doing this yourself by the method you describe using a fresh set of files from here, but, if your tech guy does do it, make sure you instruct him to use the proper files not their own.