Web Help should work, it is pointing to
http://www.evoerp.com/webhelp/evohelp.htm which seems to work. if you copy the EVOLELP.CHM to your C:\ISTS\ folder and add a line to the [Setup] section of C:\ISTS\TASPRO7.INI that says
HelpFileName=c:\ists\EvoHELP.CHM
it should work.