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Downgrade From vBulletin 4.x To vBulletin 3.x
By vB.Org Poster
09 Jul 2018 23:46

Hi ,
One of the topics that most of webmasters talking about that is : How to downgrade from vBulletin 4.x.x to vBulletin 3.7 or 3.8 .
You can downgrade your vbulletin from 4.x to 3.x very very easy ! Without losing attachments , thanks , passwords .
You need IMPEX ( One of the vBulletin scripts like an addon ) to Do this work .
How to do this :
First of all you must get a backup ( export ) from attach and post_thanks table from your phpmyadmin ( in .sql format )
1. Get full backup from your vbulletin 4.x database .
2. Go to and download IMPEX Script .
3. Make a new database and a new place for your new vbulletin ( 3.8) .
4. Install vbulletin 3.x ( 3.8.7 for example ) for your new database .
5. Extract the impex script and upload impex files ( in upload folder ) to your 3.8 forum root .
Now you have 2 databases . We call 4.x database old and 3.x database new .
6. You must config impex .
7. Go to impex folder in 3.x forum and rename to ImpExConfig.php
After rename , Open and edit it :

Kod Blok Kilitli:      (Kayıt veya giriş yapmalısın)  
Engellenmiş, kayıtlı olmayan veya onay bekleyen kişiler kodlara erişemezler.

You must set 3.x database informations in TARGET
And set 4.x database informations in SOURCE
8. Go to vbulletin 3 admincp --> Login --> You must have a new tab "Import"
9. Click on Import tab then you will see import page.
Select system : Choose 3.7.x
Select version and product : Choose vBulletin 3.7 and 3.8
Start all of the modules .
After you do this work you must go to update counters and update all of counters.
After all of this works you must import post_thanks and attach table . ( then optimize tables)
Thank you & Be successful . :)

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