The requested URL /store/adminarea/FILENAME_ADMIN.php was not found

I noticed this error after I upgraded from 1.3.9 -> 1.5.0 and installed language pack & estorenow template.

Tools - Admin Settings = http://heinaaho.com/verkkokauppa/paakayttaja/FILENAME_ADMIN.php
Tools - Email Welcome = http://heinaaho.com/verkkokauppa/paakayttaja/FILENAME_EMAIL_WELCOME.php

These both give me an error that page not found:

*Not Found

The requested URL /store/adminarea/FILENAME_ADMIN.php was not found on this server.

Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.*

I've been trying to find out where these are configured but I just can't figure it. I would appreciate if someone could pinpoint me to some direction...

Zen Cart 1.5.0
Database Patch Level: 1.5.0
v1.5.0 [2012-01-03 23:45:30] (Version Update 1.3.9->1.5.0)
v1.3.9h [2011-11-05 13:13:00] (Fresh Installation)

Your /includes/filenames.php file appears to be damaged.
And, if that's damaged, then most likely you've got numerous other files that are also damaged. You should re-upload everything.

DrByte:

Your /includes/filenames.php file appears to be damaged.
And, if that's damaged, then most likely you've got numerous other files that are also damaged. You should re-upload everything.

I actually tried updgrading it once again, same error. Then I tried installing the version 1.5.0 from scratch and it works... actually there seems to be own submenu for admin stuff. Good point that there might also be something else broken. I will do new full install because it is still possible. Thank you for your help.

I have also noticed exactly the same issue.

I allowed HostPapa to do an automatic upgrade of my Zen Cart with obviously unacceptable results

I will now go and try to find what they did wrong