Missing Business after Power Cut

I am on 16.11.88 and my 000…000 files in subfolders with gibberish names contains data, not indexes. See screenshot with filesize.

The live data files however remain under the main folder

I am not sure, as files with gibberish names in “main” folder had not changed for a long time (despite I’ve entered transactions to businesses, I think last change was before my migration to newer version of Manager, that changed data file storage structure), 0000…0000 in “gibberish” name folder, on the contrary, changed.