Hi
You don't say what existing version you are using?
The issue with the install folder isn't clear??
Do you mean you ftp'd a newer install version than the one that came with the existing version?
If you did then you should expect some incompatibility issues that don't even make sense maybe.
What are you trying to validate and why?

Sorry for the questions but your procedure is questionable and you give little detail of what you are actually doing for something I've never heard of 'validating' before.

Remove the install folder and does it all work fine.?
Copy current version as a backup and install properly, all files and see what happens?

Please indicate the version(s) you are using and want to install.

Looks like fun to be had.

6.8.8 to 6.10.8

The instructions say to "validate, read the standard upgrade procedure.

But disregard as I see I was supposed to add the original install folder from 6..8.8

Optional: validate your existing DB

You can do this by restoring the /install folder of your current (old) b2evolution version (be very careful to use the correct version and NOT to mix different versions).

Optional Hmm!

If I have seen it, it's passed me by.

Anyway with or without the 'validation' hope things are running smoothly now :)

Thanks