Beta Address: http://blish.org/sdrdxdoc/upgrades.html

3 - Getting Going

3.1 - Upgrades

New versions (number change, not letter) will create new preferences settings. Previous to version 2.09, this meant that the program would wake up "dumb", like new. That kept the preferences between versions separate, and prevented old preferences from being lost — which in turn meant you could keep, and run, older versions. It also meant that you had to run through the procedure on the next page, "New Installs", with every upgrade.

Beginning with SdrDx 2.09, a marker is saved that indicates the most recent version that has run; when you upgrade to 2.09 or any later version and run it for the first time, SdrDx will recognize that it is a first run for that version, and pick up your settings from the previous version of SdrDx. This mechanism both allows for each version to maintain its own independent settings, and for upgrades to pick up previous settings.

Note: What this means in practical sense: a 2.09 upgrade will look for 2.08 settings (this is a special case); a 2.10 upgrade will look for 2.09 settings (this is the first "smart" upgrade using the new mechanism); a 2.11 upgrade will look for the latest of 2.09 or 2.10 settings; a 2.20 upgrade would look for the latest of settings saved by any version 2.09 through 2.19, and so on.

Caution: Note that your memory save files are not assured to be compatible from version to version. It may be that your most recent saves will not be usable with older SdrDx versions.

Warning: Later versions of OS X are extremely (and inappropriately) aggressive about caching application preferences. You can delete or manually replace the preferences file with one you have archived elsewhere, restart SdrDx, and OS X may still use the old version, which is stuck in memory.

Instead, use the "Reset ALL settings and exit" menu command in the File menu. This will give you a totally clean restart.