Very useful tool!
1. On user side:
The goods:

• at start inform You if is some updates
• it make correct update even the plugin name have some modifications compared with installed version (eg. have a version number in name)
• this avoid to have duplicate and is more easy to control

Less good:

• it make update only one at a time not multiple which mean You need to restart SH3D after every update (at least this happen to me)

Suggestions:
- on Search tab filter the already installed and let only the rest.
- for every plugin add a list with available translations.

2. On web page:
- the link to World Installation map point ONLY to list NOT to map like few days ago
(or this is only on my side?)
- at login Firefox is complain "This connection is not secure"
I don't care about this but maybe others.