ChronoForms v5 could not connect to database

Hi,
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I have a problem with my contactform ChronoForm v5. I am getting the error 'Could not connect to MySQL'. .
I already made an update. Is there somewhere in the ftp- files where I can reconnect the form to the database? Or what could be the problem? I'm currently running Joomla 3.3.6 on PHP 7.1. Website is: www.intercoiffure.be.
Thank you very much!
Regards Els

Hi Memento,
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Is that the full error message?
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Do you have any ChronoForms specific settings in the Forms Manager Settings tab? If, so they might need updating.
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Also, is your site using the old MySQL driver (check the Site Configuration settings) that might need to be updated to MySQLi
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Bob

Hi Bob,
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Thank you for your reply. I just checked the MySQLi driver and that seems to be updated and correct. But what do you mean by Forms Manager Settings Tab? I can't seem to find it.
In the global settings I can find the ChronoForms5 but I can't see any options or possibility to perform an update.
Thank you.
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Regards Els

Hi Els,
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In the ChronoForms Forms Manager page where you have the list of forms look at the icon bar towards the right hand end there is a Settings icon.
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Bob

Hi Bob,
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It seems I cannot open that page, when I go to the Chronoform , this is the only thing I can see. Hereby some screenshots:

Hi Els,
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Sorry, I haven't seen this particular problem before. Do you have the latest release of CFv5 installed?
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Bob