CorelDraw 2020 saved my file in 24.30 format and now won't open it!

Hello, 

I just spent about 8 hours on a kitchen wall elevation drawing and when I saved it... Corel 2020 saved it in 24.30 version... when I go to open it to continue work it tells me that my version of coral can not open it and that I have to upgrade my software! 

How can 2020 write 2024 version files and more importantly how can I get back into my file?

Would anyone be willing to let me send it to them, open it it 2023/2024 and then save it out to the 2020 file format and send it back to me?

Thanks very much,

Bruce S
Aardvark Hill