Hi Eric - yeah… so now we export nested groups, corresponding to the layers. I think your objects are in two groups, Temp and Temp1 for example - I vaguely remember this is by design, but I could be making that up, and I do not remember the reason- I’ll ask the developer.
@EricM - apparently the change was quite deliberate and it allows incoming obj files with groups, or round-tripped ones, to distribute the objects onto correctly nested layers. So, the question is, how bad is this for your workflow? It may be possible to write a post-process tool to tweak the obj files, and in a future (say 7) version, make an option to combine groups.