My email is from aol.com but my email is verizon.net (verizon bought aol) The auto search wants pop3 but aol is imap. Your program won't let me fix it.

I tried stopping the auto lookup, but when I put in the correct information, Thunderbird would not let me save it (the done button is grayed out). My correct email is rjvkmk@verizon.net (verizon/aol offered an option to maintain our original email name and not have to open an aol email named account). The correct server is at imap.aol.com. they use imap not pop3. port 993, the smtp server is smtp.aol.com port 587. How do i change these settings and have them saved by Thunderbird? The old verizon server still exists but has not been updated since the change over so i can't get any new email from those verizon servers.