Since this morning, if I'm trying to open a file ( a .veg file that is) this doesn't works. It will only work if I use WinExplorer then double-click on the file... How come and how to fix it? I tried "reinstalling/repair option" Vegas 3.0c and that doesn't change anything.
If you mean starting VV3 & then going to file open...
It's likely going to be a pain in the ___, & hopefully someone will have a better answer, but the only way I'd know would be to remove all the related windows registry settings & reinstall. A repair doesn't always fix a bad registry setting - it can't always remove a bad key or key value.
The easiest way to accomplish this is by going back to an earlier, known good copy of your registry. I know win98 stores copies in the windows\SYSBCKUP folder with names like rb001.cab. Note the latest one, reboot to the command prompt, & type in scanreg. Follow the prompts and you can restore the registry from up to 4 days past I think. ME & XP have restore points, & xp has last known good - I'm unsure about win2k but I *THINK* it stores backup copies similar to win98.
Another approach would be to remove VV3 & then reinstall. As a last resort I'd go through the registry manually to remove anything VV3 &/or .veg related, backing everything up first of course.