It sounds like there may be an issue with the way SCID is saving the database settings when you load it at startup.
Here are a few things you can try:
Make sure that the database you want to load at startup is the default database in SCID. To do this, go to File > Set Default Database and select the database you want to use.
Try manually opening the database you want to use after SCID starts up. To do this, go to File > Open and select the database you want to use.
Check the preferences settings. Some versions of SCID have an option in the preferences to load a specific database at startup. This option can be found in the File menu, in the preferences section.
Try saving the layout of the database with the layout you want. In some versions of SCID, the layout isn't saved after closing the program, so it's necessary to save it manually by going to View > Save Layout.
Try using a different version of SCID and see if that resolves the issue.
If none of these steps solves the problem, it may be a bug in the version of SCID you are using, and you may want to contact the developer for assistance.