[Plugin: WP-Table] no upgrade for WP 2.5 ?

Since the essential part of my site is based on this plugin upgrading to the latest WordPress version is impossible for me. Unfortunately only one (this!) plugin exists for managing tables. It seems that the author does not plan to upgrade it to WP 2.5.x.

Has anyone already adapted the plugin code? I remember from somewhere that the only problem is while activating the plugin. Tables display still nice if you dont inactivate the plugin during WordPress upgrade.