a better overview…I had over 40 Files open

Not really sure what you’re looking for; only you know that for sure.
Perhaps it is a 100% replication of what you mentioned (of which I have no knowledge), and nothing else will satisfy. If that’s the case, stop reading right now. :-)

Otherwise, here are some options in Notepad++:

Press Ctrl+Tab and you’ll get something like this (yellowish vertical popup):

Perhaps that meets the (unknown) need?

Otherwise, look to the left for something called Doc Switcher.
Perhaps that meets the need?

My screenshot shows ~40 tabs open, but the tab bar leaves something to be desired as it is single-line by default. What you can do is turn “multiline” on to (eat up some real estate and) look like this:

You can show open tabs vertically if you’d like, although that is mainly for the sadistic:

The bottom line is that you have options, but we don’t know what you’ve tried and discarded, or what you’re really after.

search within all the tabs

Have you tried the Find dialog’s Find All in All Opened Documents button?

to search within all the tabs

There is a plugin called “NavigateTo” available here:
https://github.com/young-developer/nppNavigateTo

I see the latest version is 2 years old, and it’s in both 32bt and 64bit versions.

I don’t use it and cannot verify as to it’s capabilities or even if it still functions within the most recent versions of Notepad++ (these are created by people other than the developer of NPP)

It seems to have a search function but other than that you will need to try it for yourself to see if it fits your needs.

Terry