[KuraFire]

drews: what error(s) are you getting?

Areku: once you upgrade your vB3, to have the HTL work again you only have to re-apply the few file modifications. IF you have the HTL installed already, you can use the HTL's built-in feature to LIST ALL MODIFICATIONS -> this shows all file edits needed for all of your installed (HTL-) hacks. Including the HTL itself. So before you upgrade your vB3, open that page in a separate tab or browser window, and then do the upgrade.
Also, see the very first post in this thread, it has a link to a tutorial on how to easily upgrade your vB3 using the HTL.

stand68: check to see if your database table `language` has this column: phrasegroup_hacklog - if so, delete it. Then also delete, on the phrasetype table, the row where fieldname='hacklog' (IF it exists). Then try again.

YogiTW: the HTL is mostly forwards compatible, so unless a new vB3 version has some major changes in where functions are or what the (existing) functions do, the HTL will work right away with upcoming releases of vB3 (like 3.1). It will only require you to re-apply the file changes.