It's a great app, when it's working. Is it worth $5? Yep. Hell, it's worth a one-time $20 donation, if I know that will have the developer make sure that it stays working.
If this add-on is worth $5 to you, and I suspect it probably is if you've used it for any length of time, then DONATE FIVE DOLLARS and provide some incentive for the developer (who has clearly moved on and backburnered this project) to spend a little time and fix it.
Just an idea. :)