DrPython 3.9.0 Released

The preferences directory is now in the environment variable 'APPDATA' by default (windows only). Also, the program directory is used by default for the prefs directory if the user's home directory will not work.

Preferences now mimics a dictionary (no longer uses 'exec' to rerad/write/copy/reset preferences). Open Import Module Dialog reworked to be easier to navigate. Added Source Browser Go To Dialog. Find/Replace now works in the Prompt. You can now import/export plugins, preferences, drscripts to/from zip files.

Find now makes sure the selected match is always visible.

A lot of internal changes/bugfixes, including new variable names/functions (see changelog).