Could you add a donate link to your home page? Love Explorer++ and would like to contribute $5. There's no easy/evident way to donate that I can see. I know others would like to donate as well. Running a search for "donate" on these forums brings up a few posts that make this request as a side note.
Here's a useful PayPal badge/widget I use: https://giving.paypallabs.com/authenticate/review
You could also use a simple PayPal donate button. It doesn't have to be flashy or obnoxious. We just need an easy way of monetarily supporting this project.