Download .Net Framework 4 below

dotnetfx40_full_setup.exe
File Size:	889 kb
File Type:	exe

Download File

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 .Net Framework 4 is needed for World Wide Earth v4.0.30.40 or later.

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Download .Net Framework 3.5 below.

dotnetfx35setup.exe
File Size:	2869 kb
File Type:	exe

Download File

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.Net Framework 3.5 is needed for World Wide NotePad and  World Wide Earth v3.6.28.38 and lower.