If the database could not be updated by clicking "Update" button in Administration and Monitoring console, you can use scripts to update the database to the required version manually.

Scripts for database update are located in the folder \inetpub\wwwroot\FlexiCapture12\Server on the machine with application server installed:

You should apply them one by one, starting from current version of the database to the latest available.

For example, you need to update database from 129 to 135 version:

1. Run Upgrade129to130.sql:
   • Click Apply patch button displayed in Application Server section of Administration and Monitoring Console 
   • Navigate to folder with script file and select required one;
   • Or run script using any other suitable way for executing *.sql files on required database.
2. Then run Upgrade130to131.sql , Upgrade131to132.sql, Upgrade132to133.sql, Upgrade133to134.sql;
3. Finally run Upgrade134to135.sql.

Current version of the database is usually displayed in Administration and Monitoring console. If it's not available, then you can check value of DatabaseVersion in [dbo].[Settings]. Screenshots for both cases:

As usual, before an update please create a database backup (take a look at article "Creating an ABBYY FlexiCapture backup" if necessary).