Magento PDF Invoice Extension Fix

I need a developer to modify the PDF Invoice Pro extension for Magento. Currently, if the password field in the admin is left blank, it sets a random password (check screenshot). I want it to not set any password protection at all in that case.

Requirements:
- Modify existing code
- Ensure no random password is set
- Test to confirm functionality

Access:
- SSH and Admin panel access will be provided

Ideal Skills:
- Experience with Magento development
- Familiarity with PHP coding
- Ability to work with Magento extensions

I have more card in our Trello board if we are both happy working together.