For reinstallation of xplorer2 I suggest that there be a help menu item to open the window for entering the existing key.
As it is this pops up occasionally and you then have to hunt for the file with the key when you might be doing something else.
Many programs have this feature
Suggestion for entering registration key
Moderators: fgagnon, nikos, Site Mods
Suggestion for entering registration key
Schiehallion