Ann: Mining of First Ore Block at Granville Tin Project, page-83

You are correct, the initial appendix 3B was issued on April 23, the amended one was issued July 17.
Which now means the minimum share price conversion can be calculated from March 3rd, not February 1st. So it hasn't been set yet.
Therefore ANW still has a chance to get the share price up [March 3rd] and until March 23rd to pay Lind back what it can.

I assume originally ANW was thinking it would be processing East mine ore in January and would have sales underway with the option of paying back Lind, at least in part.

One can only speculate !!