NO$GBA ROM image crash

I was playing FE: Shadow Dragon and DQ IX. And both ROM images crashed when using 2.6a and DQ showed some minor graphical issues with character models.
FE crashed when I tried to start Chapter 1 and DQ crashed after I won the very first fight. Also even though I saved in between chapters it wouldn't make a .sav file for FE in the battery folder. I got it from emulator-zone, and it crashed, thinking it was corrupt I downloaded it from the NO$GBA's website but it also crashed.
I'm playing DQ right now on DeSmu 0.9.5 and I haven't had any problems so far, even the graphical issue with the models is gone. Its just slower and more laggy.
For your anti-piracy policy on NDS. I'm only using an emu because I'm not sure if I actually want these games or not. No sense in wasting money on a game I don't like or don't really want.

Graphic issues on FE:SD can be fixed by using the No$zoomer, with EX0 enabled on EXTRA settings, as for DQIX, it can only be fixed by changing the 3d Renderer to OpenGl on no$gba emulation settings at the expense of game speeds.'Rom-Image Crash' issue only happen on no$gba 2.6a if the emulator missing required files, like firmware.bin or the games aren't compatible with the emulator. Try using the full package.You can increase the game speeds on DeSmuMe a bit by changing the value of Frame Skip from 1-3, and set the 3D Settings to 'SoftRasterizer'.
If the game still lagging, try using the nosse version.