In order to convert the content of a split multi volume RAR archive (like the .r76), you would first need to gather all the pieces and then merge them to a single big self-extracting archive (.exe). This can be done easily in WinRAR, if you got all the pieces.
No other r76 to exe conversion is known to us. If you know any, or looking for something specific, please write it in the discussion below.
Updated: July 23, 2020
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