Ok, seems that the download page is slightly changed between now and the time OP posted. Strangle enough I noticed that when I logged in to the website that I have an “I already paid” option which allows me to direct download. Then I felt bad for not donating so I went back to the download page and made the donation, however when returning from paypal to Fritzing it resulted in an internal server error. @KjellM I can share / pm the ‘return’ link if that helps investigation
Personally I find that the download section can still be improved. I don’t think people are reluctant to donate, as long as it’s clearly explained that you either donate and get binaries or build it yourself (which no-one will probably do anyhow, heck i’m member of an Agile development team (Java), i checked if I could easily build it but when I saw the instruction i was like; nope, not gonna do that, too much effort)
Usage of Patreon is an interesting suggestion as it also would allow for recurring donations (for example $1 each month) and (I think) it allows controlled distribution of the binaries