PROBLEM W/ Texture open Work kite demo

I downloaded the open world kite demo and figure the texture were too huge for my computer to handle. So I exported them to photoshop to resize (ex: 4098 texture are now 2048)
except now, when I bring those new textures into my project, they are not working anymore (the masks are not transparent, the textures are not well associated)
Is there a solution or another way I can resize the texture so this problem won’t happen anymore?
Thank you!