I was trying to edit the fields in Tools > Options > This File according to the instructions for setting up Dropbox file sync.

 

However, I discovered that I unable to change any options in the Options dialog except for checkmark options.

 

For example, in Tools > Options > This File > Background Recalc, I am able to check or uncheck the checkbox.

 

But for "Auto backup every x minutes", i am unable to change this value from the existing value of 10.  I've tried single-clicking the field, double-clicking the field, pressing F2, typing in a number, trying to click the up/down button that momentarily appears in the field - nothing works to activate this option to change the value.

 

The same thing happens when I try to select a folder for the "Sync Folder" option.

 

UPDATE:  I just discovered that I can activate and edit these options by right-clicking the edit box.  But this is not the way it is supposed to work, is it?

 

I have tried it with two different files - right-clicking is the only way i can change these options.

 

I'm using prerel49a.