Can anybody explain it? What is a new format of transponders list ?

It's not really hard to find out.

You have a file manager named 'Explorer'.

After installing this version of ProgDVB into it's own folder, not over an older one, use Explorer to look into the files and folder structure.
Compare file names, including extensions.
Then you will find a few .list files, which ProgDVB did not have before, whereas the old .ini files are not included anymore.
Now use your almost almighty tool Windows provides for THE TWILIGHT ZONE of the unknown and weird, the Editor, to find out more...

BTW, for comfortable access to the Editor from right click context menue, place a link to the Editor in your 'sent to' folder. A link is to be found in your start menue, just copy and paste.

The internal structure of the .list files is almost as self explaining as that of the .ini was before.

I've just spent around one minute, to find out for you so far.

Now have fun getting curious.

btw, ProgDVB uses an old format if *.ini files newer than.list.

Interesting.
What does this really depend on, file creation / last change date, or anything else?

From last change time of file.

What are the advantages of the new format? Less hard drive space but isn’t the old format easier to update?

You can use old format for update.

PS: Old format request >300 files. It is work too slow on slow HDD.

And on an older file system like FAT32, it needs less overhead, if number of files reduced. This many matter, for example, if you are using ProgDVB from a small USB stick or flash card.
Also a backup procedure may work faster, if not to many small files involved.

As an example, I have installed around 100 versions of ProgDVB installed, for testing and comparing. Plus a bunch of other DVB applications.
They add up to ~ 35000 files in around 1700 folders and subfolders. 1.36 GB in all, without any recordings there. But occupying > 2.2 GB of disk space on that FAT 32 partition. Over 30.000 transponder files all together, none of that exactly fitting into a cluster...

Now, this surely is not typical at all, but it may give you an idea on good reasons for keeping things compact.
And if it's one file only to update, less chances for errors, too.
Including those of users, trying on their DiSEqC / LNB configuration. The old style, arranging .ini names with position angles, but displaying bird names only instead for the setup, lead to trouble for many users, mainly in America, were many birds are quite similar to each other, but not identical.

I suppose, Prog also prepares, to implement some auto transponder update function by use of NIT and similar. That's far easier to handle, if all transponders reside in one file. A quite similar function exists in DVBsVCR2 for quite some time now, but that one uses the registry instead, inflating it to a size, that already slows down some systems, specially of people with motors.

sorry , but i don't understand how to update\edit a certain sat .

any help here ?!

Same way like old format.

do you mean add a transponder file ( xxxx.ini ) in Transponders sub-folder then edit it like before or there is a way to edit all.list file .

thanx

Either - or.

Keep in mind, Prog posted above, file date will decide if the .ini or the .list is used.

Both kind of files are just text based, with a few specially formatted lines / entries, that are self explaining, more or less.
Editor rulez

thanx all, I didn't notice that the file is handled as text !

Locate the "SendTo" folder in your Windows version.
May also be "Send To", and it can be user specific.

Place a link to the "Editor" (= notepad.exe) there in. This can be copied from somewhere in your start menue.
Sorry to be unable to name precise locations, as I never used an English Windows.

In Windows Explorer you will get a nice right click entry for the Editor this way, under 'send to' item.

Right click = power to the curious

BTW, .ini should be defaulted to be open with the Editor anyway, as this does not just relate to DVB applications.
"open with" --> mark "always open with", locate and choose the Editor / notepad.exe ...