So my ASIAIR Plus has been shutting down after first picture and returning scope to home position. I thought it was a camera issue (DSLR) because it seems like the AA+ times out because of transfer speed. By I just noticed the little SD card is missing and must have fallen out like dmjdfrompv's did. I ordered Micro SD and was just researching how to re-install and the manual (which is written for AA Pro and covers AA+) says to follow instructions which lead me here. But the comment above by dmjdfrompv says the AA+ doesn't use the SD card. Yet it has a slot for one, and I know one was inserted. I am not sure when / where it fell out. If I need to install OS onto new card, which version of the download do I use, it looks like there are several options, but none specifically for the AA+.