Hijacked mail links from Mail.app

I thought I would like Kiwi Lite and eventually buy the full version, but upon install Kiwi Lite made itself the default mail client without asking. I fixed that in Mail.app preferences, but then it did it again when I updated it! What other unpleasant surprises are lurking? I’d rather not find out.

gnatnat about Kiwi for Gmail Lite, v1.9