If you don’t have a login then the person that purchased your copy of ACF will need to provide it. It that was you then you need to submit a support ticket https://support.advancedcustomfields.com/new-ticket/ and talk to them about it or try retrieving your password with the email address for the account.
On the other hand the “qtranslate_text” field is not a field that was ever built into ACF, nor can I locate a plugin for this type of field. You should probably talk to the person that added this field type. Hopefully it was added as a plugin and not by modifying ACF.
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