R4 sdhc.com releases the new software R4i-3DS V1.45b for R4i SDHC 3DS and R4i SDHC.
The following are the updates besides the fix for "save not found error" by some low quality SD card.

1. Added adjustable save file size features without damage save file.
2. Added disable update feature to avoid card been accidently update.
If firmware was latest version update will not be allow, or go to "config/config" to manually disable update.
3. Improve unknown new games loading routine (to avoid white screen, soft-reset problem).
4. Improve some old games loading speed.
5. Display change:

• Power off button move to main config screen.
• 2 line display of game name.
• Solved display bug of save date = 0
• Solved display bug of cheat items.
• Fix display error (translation and symbols error) of multilanguage.

6. WIFI Engine update to 1.05

• Support new skins features

7. Fix soft-reset issues for games.
8. Solved some games’ compatibility.
9. Fix white screen issues if return from WIFI menu.
10. Fix random freeze.

Please refer here for step-by-step setup guides for R4i SDHC 3DS.