For Some Reason I Put A UC3D File In Rollercoaster Tycoon And It Now Doesn't Let Use Any UC3D Coaster I Download From The Internet.
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<BR>P.S When I Look At The Icon,It Shows The Rollercoaster Tycoon Logo On A Paper.

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"This Time... I Think... I Think It's... It's Going To Work."
<BR>- Dr. Bruce Banner

Its not very clear what your asking. do you mean uc3d files are associated with rct? just go to my computer, view, folder options,files types(tab) and you can edit which types of files are associated with what programs and which programs to open when useing them.