I'm running Omnifocus 2 on my mac, and it's been broken partially since Big Sur. Omnigroup doesn't support it, won't release a patch, and sells Omnifocus 3 as a

I'm running Omnifocus 2 on my mac, and it's been broken partially since Big Sur. Omnigroup doesn't support it, won't release a patch, and sells Omnifocus 3 as a separate product. I'd love to be able to just fix this small error and continue using the thing I bought.