My blog is at
http://www.posbrowser.com.au/b2evolution.new/blogs/blog.php

I got a telephone call from my hosting provider that my site was possibly under attack and it had high sql usage. So I decided to just in case update my website just to make sure it was not hacked.

So I went from the version about 6 months to a year ago to now. I firstly tried to use the
Dashboard > Tools > Upgrade
This crashed.

So I manually download a copy of b2evolution 4.1.7, and renamed the blog directory. Then put a new one on. I think

I have a main blog and several secondary blogs all feeding into the main blog.
Now the tab setting for each of these secondary blogs are in the current system
http://www.posbrowser.com.au/b2evolution.new/blogs/company.php
http://www.posbrowser.com.au/b2evolution.new/blogs/newsagency.php
http://www.posbrowser.com.au/b2evolution.new/blogs/pbarmacy.php
http://www.posbrowser.com.au/b2evolution.new/blogs/oddspot.php
None work

I created a new blog ABC1 at
http://www.posbrowser.com.au/b2evolution.new/blogs/index.php/Abc3/ and it works

When I go, I can access any of the blogs say the second one and it works.
Dashboard > Newsagency > Contents
I can edit an old post, If I press preview it displays properly on screen but if I copy the link into a new browser window it does not work. Nor does the Permalink function.

The pictures disappeared but I was able on the old backup to copy the pictures out of the media>blogs and into the new one so now that works.

How do I fix the blogs and their links?

Thanking everyone in advance