See below.
If you need, I can send the file by email.
Steps to reproduce
Open the AppData\Local\SalSoft\SQLiteStudio\settings3 file (or it's copy).
Go to settings table - Data view - General.Session. It shows a blank value and a blue ">>" for loading remaining data.
If I double-click this cell, it appears as an empty string. If I first click the ">>", there is no difference.
After operation, the cell is a blank text value, and there is no changed state in the software. At this point, even opening the editing value in editor, it also appears as an empty string for text/image/hex view.
The only effective method for viewing and editing it, is editing value in editor directly, and goes to the HEX view.
BTW, I didn't see any effective method for copying or export the value of the BLOB. The https://sqlitebrowser.org/ provides a more complete actions for blob (HEX) object.
Details
See below. If you need, I can send the file by email.
Steps to reproduce
Operating system
Win10
SQLiteStudio version
3.3.3