OK, solution found.
Apparently, the baud rate used by the uploader is "borrowed" from the setting set in the Serial Monitor utility. It seems that every time I enter energia, the baud rate is reset to 115,200 (contrary to what I stated above). This rate will not work for uploading, as Trey stated. So, just before starting a recompile/upload, reset the baud rate in the Serial Monitor to 9600, then immediately start the compile/upload. Switches set up-down-down, and S4 up. After compilation, takes maybe 20 seconds to upload.
Not clear what the timing is from pressing the reset button to