I purchased the software (v3.52) and this bug is not fixed. Let me walk you through it.
1. Create a table with a long text field and an int field
2. Type some text in the Update Blob field window and click Done. (Make sure “Set Null” is unchecked)
3. Using the arrow keys, arrow over to the int field and enter a value.
4. Press the down arrow to complete editing of the record.
5. Now, arrow back up to the int field and change its value
6. Finally, arrow back down to the empty record
This consistently clears out the text entered into the long text field and can be very frustrating. Please let me know if you can repeat it. If not, I'll send you a recording of the problem as it happens.