Hello. I recently update the Corona to 12, 3ds Max to 2025, Vray too. I try to press on open and nothing happen, just press and nothing.
Could it be, that Converter window is actually open, but it’s off-screen? Try to bring it back with one of the methods here, or in countless other similar articles: How to Bring an Off Screen Window Back: Windows 10 & 11
It dosen’t work, thank you so much for the answer. It very fast (I mean, just a clip) appear and dissappear.
Hi, sorry, but it is hard for me to understand your reports.
Do you mean that you go to File > Open and open your file, but it doesn’t load?
What do you mean by “just a clip”?
Update: sorry, I somehow missed the thread title. 
What happens if you drag and drop the converter script into the 3ds Max viewport? You can find it in C:\Program Files\Corona\Corona Renderer for 3ds Max\202X\Scripts
Hello and thanks for the answer.
No, it dosen’t work. It appears for 1 second maximum and then dissappear.
Please try the solutions suggested here one by one:
https://support.chaos.com/hc/en-us/articles/4528599396881-Corona-Converter-script-is-not-working