.TUB File Extension
File TypePaintShop Pro Picture Tube
What is a TUB file?
File used by PaintShop Pro, a graphics editing program; contains graphics that can be painted repeatedly without drawing the actual objects; may include fish, plants, butterflies, and other images; painted like a paint brush, but draws images instead of paint.
NOTE: The images in TUB files can be extracted using TubeEx.