thanks for your post.
The reason for this is a change in WordPress itself, and nothing that I can influence in TablePress, sorry. From what I know, this was done because the
title attribute is not necessary at all, when there's an
alt attribute present. Thus, there's nothing wrong with how the images are inserted, and you shouldn't really worry about it.
If you still want the
title attribute, you'll have to just add it to the HTML code manually.
Opening the linked image in a new window can be done in two ways, as well. If the link is coming directly from the "Insert Image" dialog, you can make a link open in a new window, by extending the HTML of the
<a href="..."><img src="..." .../></a>
<a href="..." target="_blank"><img src="..." .../></a>
target="_blank" indicates that the link should be opened in a new window. (Unfortunately, I can't add a checkbox here, as this dialog is rendered directly by WordPress.)
The second option would be to just insert the image with this dialog, without the link, and then add the link (with the image HTML code as the link text) via the "Insert Link" button. That dialog does have a simple checkbox to make the link open in a new window. (In the background it does the same as the manual solution, with inserting that
target="_blank". It just requires a few more clicks.)