2.4.5 doesn't work when upgrading/installing from scratch without installing it through Fantastico in cPanel.

I installed 2.4.3 via Fantastico which is on my cPanel.
Version 2.4.3 works fine but because I keep seeing a message on my DashBoard to upgrade to the "stable 2.4.5" I tried upgrading manually because Fantastico from cPanel doesn't install 2.4.5 but only 2.4.3. I downloaded and followed the "general upgrading" steps but when everytime I try logging-in to my Admin Panel, I get error :

"Warning: require_once(/home/londoni/public_html/tester.com/blogs/skins_adm/chicago/_adminUI.class.php) [function.require-once]: failed to open stream: No such file or directory in /home/londoni/public_html/tester.com/blogs/admin.php on line 163

Fatal error: require_once() [function.require]: Failed opening required '/home/londoni/public_html/tester.com/blogs/skins_adm/chicago/_adminUI.class.php' (include_path='.:/usr/lib/php:/usr/local/lib/php') in /home/londoni/public_html/tester.com/blogs/admin.php on line 163".

Note: I've changed my real addon domain with "tester.com" on the above error for privacy reasons. But, the above error should give you an idea what's wrong.

Not only that, the same error I get when I install 2.4.5 manually from scratch! (Not via fantastico from cPanel).

To make sure that, the script files were not corrupted during download, I've downloaded 2.4.5 many times in many days in the last 7 days from the b2evolution website and tried many times to manually install it from scratch but the same old error whenever I try logging-in to my Admin Panel!

The error mentions something about not finding the "admin.php" on the "blogs" folder but I noticed the "admin.php" to be on the "/blogs/conf" folder. So, why doesn't the script search for this file in that folder without searching it on the "blogs" folder and spitting-out these same old annoying errors ?
It seems, 2.4.5 is, by default programmed to look for the "admin.php" in the wrong folder!

Whenever I do the installations, I always upload the whole "blogs" folder. eg. http://mydomain.com/blogs/.

Now, I've re-installed 2.4.3 via Fantastico from cPanel since installing via Fantastico only seems to work and then installed 2.4.5 manually (not via Fantastico from the cPanel) using the files and folders from "b2evolution-2.4.2-to-2.4.5" and it's working. I just FTP'd the files and folders found on "b2evolution-2.4.2-to-2.4.5" and clicked "yes" when my ftp client prompted whether I want to replace existing files & folders with the same names.
In other words, I installed 2.4.3 via Fantastico and it worked and then got the update files & folders from "b2evolution-2.4.2-to-2.4.5" and replaced them. So, you could say this last installation is half done via Fantastico and half manually. :lol:
Everything seems to be working now as I am able to log-in to my Admin Panel but the subdomain url format doesn't work just like 2.4.3.
Do you reckon my latest install would work from now on or have I done something wrong that will create problems in the future ?