Hey, hope someone can help out. I am working with old Sony Vegas 12.0 (Windows 7.0) and a weird issue cropped up. Trying to use a Mask on one clip, I made a rectangle shape over part of a clip but then decided to do something else and Reset the Mask. Working with a different clip in a different project, I noticed that every time I loaded a plug in for effects (either Sony or NewBlueFX), that same rectangle mask shape I tried on the original clip would appear, and that part of the clip would not show the effect(s) I added. This happens even though I have no mask effects on that particular clip. When I render, the rectangle goes away and clip plays as it should. However, every time a plug-in is used, or when a part of the video with a clip that has a plug-in becomes in need of rendering, that little rectangle comes back on every clip, whether it is a video or picture, and it happens on every project.
I have deleted all temporary files but this did not help. Because the version is so old, I have resisted trying to reinstall Sony Vegas 12.0 until I can find out if anyone else has ever encountered this and solved it. Thanks in advance for any help you can provide!