Found some issues. New zip in first post.

That sounds like a good addition to Hide Old Threads.

I like the idea of this mod but I was wondering, instead of just hiding old threads maybe having the option of only locking old threads. Might be nice.

Minor issue with button showing when it shouldn't.
New zip in first post

I have already read. XTC is there very fast in this relationship.

What's happening (and XTC will have it fixed in the next version of Slider Captcha):
Slider Captcha put its language list above the string that most Mods use to find the end of %admin_txt. That meant the new language string that should have been added to %admin_txt ended up being added to the Slider Captcha section instead.

So the next version of Slider Captcha should be compatable with other Mods.

Then I would not have come. I had, however, only uninstall this mod to remove slider Capcha. The total conflict.
And it works.

But as I said, I need this mod not, it must still come with all the mods still work. Conflicts but it will always exist, especially with very complex mods like "YaMMS". There is still a lot of work to us.

And I found the problem - Slider Catcha must be installed LAST.

So I do not understand it myself. I've searched all the mods and found nothing. Get the forum play again today and re-install the mod first. Let's see what happens then. The mod itself works, the button is displayed.

The Help - files I must make ready.

Just added the Mod here - The YaBB News section is currently set to hide posts older than 100 days.

Okay - this is just weird.

The two language variables that aren't showing up for you are $admin_txt{'chopthread'} and $admin_txt{'chopthread2'}

Make sure they are in Admin/ManageBoards.pm

Later this afternoon I'll install the mod on this board.

Maybe there's another Mod using 'chopthread' as an identifier?

hide_old_threads_yabb260_2.zip i have

It's also possible you grabbed the very first zip which may have had some typos.

I also have the 1501, but I have already installed some mods. Maybe it is not compatible with any. Regardless, I do not need him so and so.

That's weird as I just installed a fresh copy of build 1501 on my home server and installed Hide Old Threads and it shows up fine in the Admin Center.

I have switched to English, the same. It says nothing.

Um, Are you sure you installed your German mod?  (Because they both installed fine on my testboard.)

New zip in the first post.

Uppppsssss!!!!!

A empty window?
As yet, what should be written.

<edit file>
 Languages/German/Admin.lng
 </edit file>

 <search for>
 );

 %floodtxt = (
 </search for>

 <add before>
 'chopthread' => 'Verstecke alte Themen',
 'chopthread2' => '<br />Um nur die aktiven Beiträge, die neuer sind als XXX Tage anzuzeigen, geben Sie hier einen Wert ein.<br />0 (Null) für keine Beschränkung.<br /><b>Note: Standardwert für neue Foren = 0</b>',
 </add before>

 <edit file>
 Languages/German/MessageIndex.lng
 </edit file>

 <search for>
 );

 %messageindex_sort = (
 </search for>

 <add before>
 'chopshow' => 'Zeige alle Themen',
 'chop' => q~Zeige letzte aktive Themen~,
 'choptitle' => 'Nicht mehr als {yabb chopdays} Tage alt',
 </add before> 

<edit file>
 Languages/German_Du/Admin.lng
 </edit file>

 <search for>
 );

 %floodtxt = (
 </search for>

 <add before>
 'chopthread' => 'Verstecke alte Themen',
 'chopthread2' => '<br />Um nur die aktiven Beiträge, die neuer sind als XXX Tage anzuzeigen, gebe hier einen Wert ein.<br />0 (Null) für keine Beschränkung.<br /><b>Note: Standardwert für neue Foren = 0</b>',
 </add before>

 <edit file>
 Languages/German_Du/MessageIndex.lng
 </edit file>

 <search for>
 );

 %messageindex_sort = (
 </search for>

 <add before>
 'chopshow' => 'Zeige alle Themen',
 'chop' => q~Zeige letzte aktive Themen~,
 'choptitle' => 'Nicht mehr als {yabb chopdays} Tage alt',
 </add before> 

This mod adds allows Admins to hide old inactive threads in the Message Index and creates a button so Users can choose to see them.

Should be useful for BIG Boards

Version History
---------------
0. alpha - July 8, 2014 - fixed button issue
0.3 alpha - June 23, 2014 - fixed 0 days issue.
0.2 alpha - June 22, 2014
0.1 alpha - First release - June 20, 2014

For YaBB 2.6.0

Instructions:

Apply the mod and upload (in ASCII mode):

cgi-bin/yabb2/Admin/Modlist.pm
cgi-bin/yabb2/Admin/ManageBoards.pm
cgi-bin/yabb2/Languages/English/Admin.lng
cgi-bin/yabb2/Languages/English/MessageIndex.lng
cgi-bin/yabb2/Sources/Load.pm
cgi-bin/yabb2/Sources/MessageIndex.pm
cgi-bin/yabb2/Templates/default/Menu.def
cgi-bin/yabb2/Templates/default/MessageIndex.template

Upload eye_minus.png and eye_plus.png to yabbfiles/Templates/Forum/default

In the Admin Center -> ManageBoards set the number of days after which inactive threads will be hidden. If no number is set, all threads will be shown.

Package also contains:
hot_German_ANSI.mod
hot_German_utf8.mod
hot_German_du_ANSI.mod
hot_German_du_utf8.mod

Choose the encoding appropriate for your installation - ANSI for upgraded forums, utf8 for new forums.