I found the reason! it depends from windows option - show file extension in explorer… Is it normal? I expected that notepad++ always shows full name with extension for “all types” and it have it’s own behaviour that not depends from windows explorer settings

Wow, that’s nice you found it!
I can take a look and see if there is something that can be done to the save dialog.
But it seems to me, this part is controlled by Windows and we have little impact on it.

… have it’s own behaviour that not depends from windows explorer settings

The Notepad++ file dialogs are not custom-designed – they a from Windows itself. So… they are going to inherit functionality from Windows and its Explorer.

You can (probably) confirm this by trying the same test in Notepad.exe.
Or maybe I’m wrong. :-)

But in my case notepad++ removes extension part from name and i need to return in each time.

I’m not sure I’m following the data here.

In the first case you have some . txt

In the second case you have 2021-02-15 . Crapune
(just an approximation).

In each case you have name . extension

Just because you don’t think of Crapune as an extension, probably Windows does.

I found the reason! it depends from windows option - show file extension in explorer… Is it normal? I expected that notepad++ always shows full name with extension for “all types” and it have it’s own behaviour that not depends from windows explorer settings

The windows standard dialogs use windows rules, and follow windows explorer settings, just like in every application that uses windows standard dialogs. Notepad++ uses that windows standard dialog.

Notepad++'s tab bar will show the full filename, with extension, regardless of that setting.

But in my case notepad++ removes extension part from name and i need to return in each time.
Why he remove extension only in this case?

I found the reason! it depends from windows option - show file extension in explorer… Is it normal? I expected that notepad++ always shows full name with extension for “all types” and it have it’s own behaviour that not depends from windows explorer settings

These type of debates (with extension handling) have literally been going on for years in the Notepad++ community. I think the judgment is that there might never be a way in Notepad++ to make all users happy. :-(

The second moment that intresting for me. Why notepad++ on rename have All Types for TXT files, bu not Normal text file option?

As far as I remember, on renaming a file the filter is and has always been set to *.*, regardless of any preference setting state. Notepad++ can’t read your mind – maybe you truly do want to change the file’s extension in the rename.

watch this animation for the effect of this option:

Notepad++ v7.9.3 comes out-of-the box with Settings > Preferences > MISC > ☐ Set save dialog extension filter to *.* disabled

If you leave it disabled ☐, Save on a new file will default to Normal Text FIle and if you type blah as the file name, it will save blah.txt in your location.

If you enable it ☑, Save on a new file will default to All Types, and you will have to manually type your selection or manually select the filetype before finishing the save.

If i change extention to TXT, then notepad++ changes the name and i need to restore it.

The second moment that intresting for me. Why notepad++ on rename have All Types for TXT files, bu not Normal text file option?

Works for me, in N++ 7.9.2:

Create new TXT file with name someFile

Notepad++ save it on the disk like someFile.txt

Click using mouse right button on this file tab and choose “rename”
Rename like someFile.important.comments

Click OK

Actually, the button prompt is Save

expectation “someFile.important.comments.txt”,

but have “someFile.important.comments”

Not me!