Yes, open two files so they look like channel 1 and 2 in the screen. Some editors call it "open as dual mono". when you've selected two files.
For one example, just for experiment, I've recorded some thunderstorms and summer fireworks by having a studio microphones in the window facing North and West here. I used Reaper (Cubase before that) and recorded them as separate mono tracks. I wanted to figure the stereo spread later on.
Also, even though I own and love ACON Verberate, there are textures for my impulse software the impulses are dual mono and it would be easy to consolodate to stereo if Acoustica allowed dual mono import and save as stereo file.
If there isn't a way for now, I can export from Reaper as Stereo panned hard left and right and import to Acoustica, but I thought to ask to be sure.
I think Samplitude, Sound Forge and Adobe Audition open dual mono.
Thanks for the elaboration and your kind words about Verberate. There's no dedicated mechanism for loading dual mono files as a single stereo file in Acoustica, but you can load both files, convert one file to stereo (Tools > Convert Sample Format), then copy the other channel. Now you can select a single channel in the stereo file and overwrite the content (Edit > Overwrite Paste).
You can easily select one channel of a stereo file by making selection in either the upper quarter (left channel) or the lower quarter (right channel) of the waveform display. Alternatively, you can use the channel selection toggle buttons on the left side.