MIME type for GIF/jpeg deleted, thumbnail doesnt s

Ok I'm on Windows 98 just Installed that MSI PhotoSuite to use with my digital camera and take pictures

then i noticed that it automatically associated GIF and JPEG images to itself and made them part of the file type PhotoSuite Image. And the old JPEG Image file type was only left for the extension JFIF

I tried to reassociate the .jpg and jpe extension to this file type but it wouldnt let me in Folder Options. So I deleted the JPEG Image file type, and re-added it

it's fine except that the MIME Type image/jpeg seems to have disappeared from the menu, and all that's left is image/bmp and image/png

and since I have the View As A Webpage feature on for my folders, when i click and image or html file it should normally show a thumbnail of it under the file size. but now it doesn't show a thumbnail for the GIF and JPEG files. I re-added both these files types but still won't show up. The MIME type for GIF, image/gif, is also gone from the list

Anyone know how to fix this? Get the default MIME types showing again, and make the thumbnails for it show up?