Changed default thumbnail sizes after products uploaded

[KevenM]

What's an easy'ish way to now make my thumbnails get re-resized based on the large image so that they show up at the new size?

If I was going from medium thumbnail to smaller, I would do a batch resize (shrink), but unfortunately, we're changing from small thumbnail (120px wide) to large (300px wide), so I don't see how I can batch resize them.  Any function or extension that might help me?  A setting somewhere maybe?GCWFYE

Using VM 1.1.5

[Milbo]

Wrong forum man. For vm2 users it is simple, just change the size and fire and forget about it. The system is doing the rest.