Option to clear registry settings

[PropGit]

A recent issue prevents Propeller Tool from fully loading. The problem is a complicated one apparently involving the order of events and memory accesses that seems to happen on some systems and not on others; however, often a workaround is to delete the Propeller Tool's registry settings and let it rebuild them from defaults.

This issue is a reminder to add a /ClearSettings command-line option to Propeller Tool.

• This allows the user to solve the problem more easily themselves (should it continue, or a similar issue happen in future versions)
• This allows the uninstaller to effectively provide a "clear Propeller Tool's registry settings" option and to execute it if chosen
• Since Propeller Tool creates and manages its own settings (not the installer), this feature would be added to Propeller Tool because it already knows exactly what settings it manages; whereas a different version my be using a different set of settings
• This feature should run minimal code, without initializing the full Propeller Tool application, so as to be usable even when normal operation crashes (because of an errant setting)
• This feature can provide a dialog explaining what it's about to do and how it may affect other simultaneously-installed versions- perhaps even offering an option to back up current settings first in case the user later wants to revert back to previous settings