I tried to upgrade from 6.2.5 to 6.3, but upon activation of 6.3 I got the following error in the WordPress admin:
Parse error: syntax error, unexpected T_VARIABLE in /home/www/example/wp-content/plugins/search-everything/search-everything.php on line 55
It looks like the string comparison is missing. Line 55 looks like this:
if ("Yes" $this->options['se_use_tag_search'])
but it should look like this
if ("Yes" == $this->options['se_use_tag_search'])
This occurs on line 59 as well. If you add the == there, the 6.3 version of the plugin will work just fine.