This plugin has been closed as of février 20, 2018 and is not available for download. Reason: Guideline Violation.
Don't waste your time installing.
[Update #2: Upgraded my rating due to great tech support. Thank you.] [Update: very prompt response from the plugin author -- thank you! I did make a mistake in my review re: an ad tracker -- my bad, and removed from the review below. I still maintain that this is not the plugin for you if you want a simple donation button.] I took over a Web site with this installed. Fixed it once a few months ago by reinstalling, now it's broken again. [Broken meaning the PayPal button does not display.] That's two strikes. Strike three is the non-standard login authentication scheme for the plugin family -- I prefer the standard, simpler way that most WordPress plugins use. Why isn't authenticating as a WordPress admin sufficient? Why the additional step that makes it hard for multiple admins to work together on a site? KISS. The tipsandtricks-hq PayPal donation plugin looks promising -- I'm going to give that a try. [Update: entered my PayPal donation e-mail address, checked the optional box that opens the PayPal screen in a new tab, added a short shortcode, done.]
Once I tried to add this into the site and lastly save the button, then without sign in and subscription its not saved. then its take me error each time. Wasted 2 hours time.
The POWr PayPal Button allowed me to create a "Donate Now" button that compliments my website. It was easy to set up and add to my page. We are happy with the results.
This is easy to use and has a lot of different features. Shortcodes great.