Not since last update, but one or two before, I have very strange print preview, that are hardly helpful in checking if what I did is correct.
Or it may be after I switched Windows 7 to 64 bit, but I am now in Win10 64, and it is the same.
If I choose the store as pdf function, though, they come out perfectly fine.
Have a look at the picture. This is NOT tweaked by me to hide anything, this is what it is. In case of assignment slips, they may appear empty when they aren't. I have tried reinstalling TB, but no fun there either.
(and why is uploading png still not working...? Anyway)
For accessing the database my personal preference is http://sqlitebrowser.org/
For editing templates I now use https://code.visualstudio.com/