This page lists a few pieces of software I've written, or am writing. Most of them were written to scratch an itch I had. I’m releasing them here as open source in the hopes of it being useful to someone.
The problem originates with this bug in Notepad++’s updater.
I’ve circumvented the problem for now by escaping the full download URLs. It works in the debug version, but we'll have to wait for the next release of Notepad++ to see if it really works in the final version as well. I’ll close this bug at that time (if I don’t forget).
The problem seems to be that the Plugins Admin doesn’t handle query string parameters properly; even the separators need to be URL-encoded for it to work.
I’ll update the PluginList (and test them) when I can, but this means they’ll only get published with the next version of Notepad++.
In the meantime, you can try to install the plugin manually.