Topcon scans are packed in a 'scangroup' folder, and inside that folder are the folders with the scannumbers (SCN0001, SCN0002, enz) which contain all the scandata. The 'Select folder to Import' option does not work on the scangroup folder, but does work on the scannumber folder. Even though the scan names will be '[scangroup] - [SCN00XX]'.
So practically you need to import each scan separately and need to adjust the import options (scan distance) every time. It would be nice if Recaps 'Select folder to import' function just looks one folder deeper to find the scans. This will save A LOT of boring repeating work that should be unnecessary.