Is Ninox Stable in Mac OSX 10.2.5?

In Trial mode (online version I think) I try to add a new field and make it a maximum height, multiline field, which I do by entering 200 in the maxium characters attribute. After I do, the field does not show up in the view I was workiing from. I am then lost. The tutorial does not work. I have written to Ninox support on that. My experience is in setting up Mac databases in Microsoft File (1986), Reflex Plus for the Mac, Filemaker Pro (a relational database with multiple tables) and Bento. After 90 minutes of trial, Ninox seems like a bewildering array of icons. Should I give up on Ninox?