Good advice for one-man shops. I was in the same situation and came to the same conclusion. Sold ~$200,000 in licenses to my software before sales started slowing down. I promised free lifetime upgrades so lost motivation to do a major new version:<p>1) I couldn't sell it to my existing customers, they're getting it free<p>2) Many of the existing customers came from a handful of niche websites where the product/audience fit was great, but their audiences are only so large so I've already sold version 1 (with the free upgrade) to most of them<p>Eventually I put the product up for sale on Flippa and took $90,000... which if I stopped development is probably all I would have earned over a longer period.<p>Plus, it's a long term capital gain, so I'll end up paying less tax on the sale versus earning it over time as ordinary income.