Why is Photo Paint X7 saving my files smaller than what they open as?


I recently got a set of high res PNG textures. I am trying to open them in PhotoPaint, change the color from black to other colors, and then save them again to use in CorelDRAW X7. My problem is that the images are huge and top quality on my computer when I import them but when I save them they save as a tenth of the original size, murdering the quality. Is there any way to fix this issue?