Install Failure Ajax Register

I get this error when I try to install over old version.

doesn't exist SQL=ALTER TABLE dkeua_ajaxregister_field_values ADD COLUMN `id` int(11) NOT NULL AUTO_INCREMENT FIRST, ADD PRIMARY KEY (`id`);

I just bought the latest.

What was the old version?
Can you go to the phpMyAdmin and verify the table exists?

I have found the following:

Old version 2.5

I've gone into PHP
dkeua_ajaxregister_field_values exists


column 1: user_id
column 2: field_id
column 3: value

Ok, Joomla 2.5 is not supported any more: www.sakic.net/news/end-of-development-for-joomla-2-5/

I can send you the last supported version but not all features will be available.

I'm in joomla 3.5.1
I think the version of Ajax register was 2.5. I really don't know, as I was peaking into the xml file in a backup copy.

OK, please send the access info by email (admin, FTP and phpMyAdmin) and I will have a look.