previous purchase of FTP voyager 16, now want to install 15 with old license but cannot

I have downloaded and installed FTP voyager 15.2.0.17.  I bought 16 sometime ago  before it went free but it never worked on my computer so I always used 15.

Now, after install  told that FTP 15 is only good for 30 days....

I tried to use the old registration and was told it was invalid and to go to site to get the

I went to the register site, register, but nothing happened re the license and registration

what do I do.

this is my registration for the license I purchased

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REGISTRATION ID

Name:Dean Echenberg

E-Mail Address:ftpvoyager@echenberg.org

Registration ID: XhnGjDU09WKIWbpUUWuZK0+utSCnVoKIQpcxM9pNKArwIIsXkpwHkHzYJw+2FThFFguFVDb8HQmA0asVXmAlL6O+rvdCAR6bmQa+doPr7o5uwbAvuqPy7bET+xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx=

the xxxxxxxxxxxxxxxxxxxx is substituted for actual registration..

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