It is extremely doubtful that an install of v4.63 will help because most of the configuration files are stored in the mailbox directories which are reused by the new install. Besides, no changes were made in v4.70 that I am aware of that would affect what you describe.
The only way a new install is helpful is if you remove the entire \MAIL directory from the picture. The installation process will create a new one to which you can copy data from the old mailbox directories to the new ones. It is important not to overwrite any configuration files if going this route which I don't think is necessary, yet.
Regarding your problem, I said earlier that what you describe sounds like the message list pane of Preview mode but it also sounds like an open folder window. What is displayed in the title bar of that window?
What happens when you click the Folders icon in the toolbar or do Ctrl+L?
Finally, at the bottom right of the main Pegasus Mail window is a blue triangle. When it is pointing down, a bar of open folder window names is displayed along the bottom of the main window. Clicking the blue triangle toggles that bar on/off. If that bar shows more open windows than you can see then one may be opened off screen. Click the Window pull down menu then select either tile or cascade. This tiles or cascades all open Pegasus Mail windows making them visible and accessible to manipulate.
<p>It is extremely doubtful that an install of v4.63&nbsp; will help because most of the configuration files are stored in the mailbox directories which are reused by the new install.&nbsp; Besides, no changes were made in v4.70 that I am aware of that would affect what you describe.
</p><p>The only way a new install is helpful is if you remove the entire \MAIL directory from the picture.&nbsp; The installation process will create a new one to which you can copy data from the old mailbox directories to the new ones.&nbsp; It is important not to overwrite any configuration files if going this route which I don't think is necessary, yet.
</p><p>Regarding your problem, I said earlier that what you describe sounds like the message list pane of Preview mode but it also sounds like an open folder window.&nbsp; What is displayed in the title bar of that window?
</p>What happens when you click the Folders icon in the toolbar or do Ctrl+L?
Finally, at the bottom right of the main Pegasus Mail window is a blue triangle.&nbsp; When it is pointing down, a bar of open folder window names is displayed along the bottom of the main window.&nbsp; Clicking the blue triangle toggles that bar on/off.&nbsp; If that bar shows more open windows than you can see then one may be opened off screen.&nbsp; Click the Window pull down menu then select either tile or cascade.&nbsp; This tiles or cascades all open Pegasus Mail windows making them visible and accessible to manipulate.