After slogging through 114 pages of messages, I finally took the plunge using Gizmo's most recent image file.
It's still available here:
http://jahansen.com/rigol/DS1000EUpdate.00.04.01.00.02.zipInstructions as before --
Copy the DS1000EUpdate.RGL file from the .ZIP onto a [FAT16 Formatted] memory stick, put it in the scope, and select OK when it asks if you want to update the firmware. It's that simple.
For peace of mind, check the copied file's MD5 (the one on your USB thumb drive) against the MD5 of the image file from the .ZIP. Always do the "eject" sequence on the USB drive if using Windows
before pulling the USB stick out of your PC. The Rigol scope doesn't bother with any data integrity checking, which is rather short-sighted. If the file is corrupted at all, you will most likely brick the scope.
Previously the readout of my Rigol DS1052E was:
Boot-up screen showed version 02.05.SP2
Serial #: DS1ED131XXXXXX
Software: 00.02.05.02.00
DSP 00.00
FPGA 02.00
HardVersion: 58
After updating I get:
The boot-up screen now shows version 04.01.
Serial #: DS1ED131XXXXXX
Software: 00.04.01.00.02
DSP 00.01
FPGA 03.70
HardVersion: 58
Despite the lack of a Rigol model number and serial number change, it appears that it is now a 100MHz scope. I'm gonna haul it down to a lab with a 100MHz signal gen for testing, my generator only goes to 5MHz. The changes in Gizmo's file survived the scope's internal recalibration and several power off/power on restarts.
That's the route I took; your mileage may differ. Neither Gizmo nor I accept any responsibility for possible damage to, or "bricking" of your equipment. Life's full of risks; ya bets yer money and ya takes yer chances; nothing ventured, nothing gained; and a whole bunch of other cliche's I can't recall.
Many thanks to Gizmo for his work and for answering his PM/email.