I've used PEP for years, without issues, on Firefox (FF 35/PEP 5.2.1) and assumed the Chrome version would work just as flawlessly. With FF, I must be using a paid version since there are no limitations -- but I don't recall my registration info, etc.
With Chrome, PEP rarely pastes anything. For example, when trying to enter an email address in GMail and with the cursor in the "To" box, if I hover over the PEP icon in the toolbar, a message shows saying "cannot paste - not a valid input field". (It is a valid field in Firefox.) Nothing happens when I click the PEP icon. This is the result I see when I've gone to various web pages, such as Google home page, put cursor in input box, and try to use PEP. On most web pages I tried, even when right-clicking and using the PEP sub-menu, nothing happens and no text is entered.
In the Forum box I am typing in now, PEP will ONLY enter the last pasted text, if I have chosen that option in the PEP Options tab. If I have chosen text as the Default when I press the toolbar icon, nothing happens on this forum page. The icon, however, shows a gold "OK", but still nothing.
In Firefox, there was also a downward pointing arrow that allowed me to access and select a variety of texts i wanted PEP to input. That arrow is missing in the Chrome version. The only way to access that list is to right click and use the PEP sub-menu.
I tried disabling all my active Chrome extensions other than PEP, with the results above. I don't believe I'm doing anything incorrectly. I'm on the most recent version of Windows 10, and using Chrome 56. Everything is up to date.