Hey, I had ran into this too. Trying to find a file my phone indicated had transferred successfully by bluetooth to my PC (Windows 10).
I found two things:
- If I open the bluetooth transfer window (run command > fsquirt) and click "Recieve", after the transfer, the wizard will ask you for a save location (my default was my system Documents folder).
- If located my first transfer (the lost one) in my AppData folders:
%USERPROFILE%\AppData\Local\Temp\FSQ_0171.252
For you, it might be FSQSomeNumbers, since that looks to be a version number. So just go to %USERPROFILE%\AppData\Local\Temp\ and go to the "F"s in the list.
I hope this helps.