As you would update any modification:
Overwrite the files, import the XML - done.

And when importing the xml, don't forget to put the "overwrite" selection to "yes: .;)

^^Thanks all for your quick reply! ^^

Please see http://www.vbulletin.com/forum/proje...?issueid=27187 for details.

This bug is consistently reproducible on my installation of 3.80.

I have determined that it is this template that was producing the bug. Basically, with this add-on enabled, the list of templates shown from Edit Templates is abbreviated unless I click on "Expand all". When I disable the add-on, I can see the full list again.

This is an extremely useful add-on. I hope you can find a fix for this.

Sounds like yet another "strange gzip/output buffering configuration" problem.
Sorry, this can't be reproduced and I an therefore unable to help you.
Feel free to send me a PM with all required logins (ACP, FTP, PMA) and i'll take a look.

What does "strange gzip/output buffering configuration problem" mean? Does enabling gzip pose a problem for this add-on? What about eaccelerator?

is this only for hack writers or everyone can use it? and can people like me with no knowledge at all of html or similar stuff, use this?

No. But somewhat strange configurations (eg. gzip enabled in vBulletin and output_hander set to ob_gzhander(), zlib.output_compression enabled and mod_deflate enabled, output_buffer way to small, etc.) can cause such issues.
I am using TMS on about 80+ production forums with eAccelerator without a single problem.

very cool mod :D

i'm using it on my forum very handy indeed

With or without gzip enabled, enabling this add-on truncates the templates list,