Upgrading 5.3 to 5.4

[CotswoldAdvisor]

Ive got my site woeking just as I would like it but 5.4 has some features i would like.
Ive downloaded the 5.4 but am a bit worried about doing the upgrade, the last thing i want is problems with the site as its running good now.
My question, should it be straightforward?
Is there anything i need to do to make it go straightforward?

thanks

[Bruceper]

upload, run install.php, choose upgrade, done.

[CotswoldAdvisor]

I have the day off work tomorrow , so i will upgrade tomorrow.

it says in the read me -

. Upload all files except template files and application.php

what does it mean by template files?
i pressume it means the files in the theme folder?

[Bruceper]

yes the files in /themes/yourtheme/

You MAY need to replace two files in your theme however. Those are msg.php and setting.php. Don't overwrite them unless you get errors. Of course you can always post here for clarification.

And that file is correct, you do not need to overwrite application.php.

Of course, always make a backup of everything first.

[CotswoldAdvisor]

Arrghhh.
Its gone wrong.
Done the upgrade all seemed well.
now when i click on a category link i get an error.

Error 500 - Internal server error
An internal server error has occured!
Please try again later.

Help please.

http://www.cotswoldadvisor.com

Edit-turning modrewrite off makes the site work, so ive done that for now but i really need to fix the issue.

[Bruceper]

As answered in your PM, update your category paths.