Here is his post about it:
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You can try to persuade the dev to upload the last not finished version of the last work or take the work to other developer to finish it. I believe there's not much left to finish there.
But only don't blame or scold the developer, it won't convince him to do something good for you.
After all there is no so problem to edit rpgmv game just add project file in www dir. The only issue is if the dev is also illustrator then finish cg only possible using "ai" generation with the lora trained on the game cg.
Hopefully this developer will overcome his/her problem and will be fine. It's sad that often these kind of messages from the devs on the site, low physical activity and lack of sleep worsen physical and mental health very quickly.