Wrong font in helpfile

I've just installed Robohelp 7 and are working on a help project originally made with robohelp 3, robohelp 4 and robohelp office 2002. However when I am generating the helpfile all fonts are in Times New Roman although that font isn't used at all in my project. I mostly use Arial and in some rare cases Futura. I have successfully re-edited the text with futura so that font is shown correctly. But the arial-text still shows in Times New Roman.

The output is Winhelp 2000 (but the same shows in Winhelp 4).

PS: I read some old topics about this about a security update for MS office in 2006 but since my computer is freshly installed with Office 2003 that update is not installed.