Usually options are saved on setting file "MultiPar.ini" under MultiPar's install folder. When MultiPar is installed under "Program Files" directory, your setting is saved in "MultiPar" folder under each user's "Application Data" directory. You may locate the folder at "System settings" page.
  If you want to reset all options at once, delete the "MultiPar.ini". If you want to reset every options on a page, push "Reset" button at the page. If you want to reset a specific option only, just erase the line on the setting file.
  When multiple instances of MultiPar are open, change of setting over an instance won't reflect to other instances. If you want to enable the changed setting on another instance, you need to re-open newly. When you change different setting over some instances, the result will be the sum of all changes.
  Option window consists in the following 4 pages.