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Key not Excepted for FSUIPC4

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Seem to be having problems with the key I purchased for FSUIPC4.

Download from the link for FS2004 and installed ok. Went to register program when install completed to be told that current version is later. When I put key in it said, THIS KEY IS NOT VALID FOR FSUIPC REGISTRATION.

I have checked which version I have installed at the moment and it is Ver:3.98

Any help appreciated


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