How to update?

[swe-mbernhard]

Hi.
I'm running netbox 3.7.1 and installed the proxbox plugin yesterday. I configured it correctly and I can run the Full update.
However, the plugin is not populating the custom fields I made, and does not assign ip's to interfaces, and a few other strange things.
When I look in the footer of the site, while being in the plugin UI, it says that my version of proxbox is v0.0.3, which could explain a few things.
I followed the installation guide, so I should have the v0.0.5? Or am I missing something fundamental?
best regards

Markus