I forget to tell you solution on the same pc but sometime it doesnt work. Still try this. Open file location, go to file explorer are where you see 3 dots. Click that, click Options, go to View and unselect "Hide extension for know files types" click ok. You will see another extension on your file after the .psd So delete that and rename it with .psd  It should work that way too. ... View more

When you save file with .(dot) extension, it usually gives problem when you try to open it again. Do not worry, your files and saves text types, design everything is still there. It somestimes not possible to fix at the same pc. So, to solve it, copy that file and flash drive and open on different pc. In my example, I saved file as 10.22.2024 (example). When you save file with dot, system try to recognize it as file extension after the last dot. So it crashed and I couldnt open. I tried to rename it .psd and it still didnt recognize. Because somehow, system hide 2024 and it showed me only .psd After I copied it to the flash drive and open it in different pc this is what I saw file name as  mycardesign.10.22.psd.2024 As you can understand that I wasnt able to see 2024 on the previous pc and it let me only add .psd extension. So on the second pc, I deleted .2024 and was able to open file. Then rename it without using dot like 10-22-2024.psd Or dont even use full date. After I rename and save and copy flash disk, I was able to open at previous laptop. Viola..... ... View more