I've been scouring the internet for a way to buy Vegas Pro 10 and I can't find a single legitimate copy, so it seems I'll have to go current. Can anyone verify whether project files from Vegas Pro 10 can be opened in Pro Edit 15 without issue?
Copy one of your project files with a different name and download the 15 trial and give it a try. There are a lot of variables that can affect compatibility including which effects might have been used.
Okay, that's a good idea. Assuming the version 15 trial won't overwrite or interfere with the unregistered version of 10 I currently have installed...
It shouldn't overwrite or interfere with VP10. I have both 10 and 15 (and 12, 13 & 14) installed. My VP10 projects all open in VP15. One problem you might have is if you have used a 3rd-party FX in your project that is not supported in VP15.