Newby Question Here:

I had never used ZenCart (Zen Cart 1.3.7 Database Patch Level: 1.3.7) before, but a month ago I decided to prepare a site wwwx-tough.com This morning I uploaded version 3.3.3 of the Simple SEO URL plugin and did not realize it was still in Beta Testing and came with a giant disclaimer "DO NOT LOAD ON LIVE SITES!"

And of course I loaded it on my live website. I don't know very much about coding and even the "simple" instructions proved difficult for me. I think I am on the right track but I see this message on my website now:

Parse error: syntax error, unexpected T_STATIC, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /nfs/c01/h08/mnt/45198/domains/www.x-tough.com/html/includes/classes/ssu/core.php on line 3
On the backend of my website I see this message when I go to the SSU plugin under extras:

Warning: main(includes/classes/module_installer.php) [function.main]: failed to open stream: No such file or directory in /nfs/c01/h08/mnt/45198/domains/www.x-tough.com/html/admin/ssu.php on line 10

Fatal error: main() [function.require]: Failed opening required 'includes/classes/module_installer.php' (include_path='.:/usr/local/php-4.4.8-1/share/pear') in /nfs/c01/h08/mnt/45198/domains/www.x-tough.com/html/admin/ssu.php on line 10
I have looked through the forum and seen fixes for the fist message with changing to PHP5, but I also see a note that version 3.2.2 only supports PHP5. Is that the solution to my concern?