[Marcov]

Apparently I've lost the help document for FRED2.

It says: "Unable to locate Fred Help file: \data\freddocs\index.html"

Is there any available download or something?

[Goober5000]

Do you have any mods active?

Can you browse to that folder manually (e.g. using Windows Explorer)?

[FreeSpaceFreak]

In your main FS2 directory, there should be \data\freddocs with a bunch of files in it, the FRED help files. If you don't have them, you can download them from the K-faq, namely here - Under HotU, download Fred Docs.

[FUBAR-BDHR]

Yea easiest thing to do is just brows to it with your web browser and bookmark them once you load the right index.  Something like this:

file:///C:/Games/FreeSpace2/data/freddocs/index-no-really.html

Noticed the index isn't called index.