I don't know that I will be venturing into SD cards as the version I have of Memory Card Explorer is only for PCMCIA style Type II, III cards whether they be:
"16 bit, Wireless LAN Card (802.11b, Bluetooth, etc.), SRAM cards, Linear Flash cards, ATA cards, Modem cards and LAN cards".
As is the Elan P423 hardware also.
With the above, though setting up a working system can be a bit of a hassle, you are dealing with binary files which can be I believe in almost any format. With Linear Flash cards they do not require formatting, (proprietary or otherwise).
If the files used with SD cards are not directly transferable with a PC using something like Synchrotech's SD Card Reader seen here:SuperSpeed USB 3.0 XQD and SD Card Reader + USB 3.0 port
Their SD card readers do not require software that I know of.
The USB compatible PCMCIA Card readers from Syncrotech with software are presently $569.00 which includes the software.
Even with the digging I did, I believe what I spent to make this work was around half the price.
There are reports from the MHHAuto Usergroup that Memory Card Explorer v3.21 will operate under Windows 7 as well.
Not sure if I answered your question though.