Is it possible that the Window is there, but "off screen"?
If it is a window issue, then the X1Config.ini file holds the details of the least position.
Close X1 completely in task manager. Find and rename that file.
If you can now see X1 when it restarts, and you want to recover your earlier settings, you could edit your renamed the ini file with setting from your working version in section:
[Window]
Left=
Top=
Width=
Height=
SearchFieldWidth=
State=
Do all this carefully. You don't want to wreck the whole thing.
You will achieve the same effect if you uninstall X1 without saving the settings and then reinstalling. But that loses settings and forces a reindex.
If it is a window issue, then the X1Config.ini file holds the details of the least position.
Close X1 completely in task manager. Find and rename that file.
If you can now see X1 when it restarts, and you want to recover your earlier settings, you could edit your renamed the ini file with setting from your working version in section:
[Window]
Left=
Top=
Width=
Height=
SearchFieldWidth=
State=
Do all this carefully. You don't want to wreck the whole thing.
You will achieve the same effect if you uninstall X1 without saving the settings and then reinstalling. But that loses settings and forces a reindex.