Converted BSP brushes to Static mesh. Is it possible to fix lightmap and keep textures the same size?

Hello,

I converted BSP brushes into a static mesh. The lightmap was red and overlapping so I tried to fix it. I fixed the lightmap, but now the textures are scaled too large. Is there an easy way to fix this?

(you can see that the wood planks are giant now and they should be much shorter/skinnier).

Thanks,
Skout