From SM:

"If Poser crashes or starts behaving oddly for no apparent reason, it may be that its preference files have been damaged or corrupted. Removing the damaged files will restore Poser to its factory default settings and may fix problems that won't go away otherwise. This won't remove any additional figures, props or poses that you might have installed.

To remove preferences, QUIT OUT OF POSER FIRST! and delete the prefs files. The specific files to delete are the Poser Prefs, LibraryPrefs.xml and Poser UI Prefsxxxxx.xml files. Poser will rebuild these files the next time you start the program.

NOTE: If you use Multiple Runtimes
Copy your LibraryPref.xml to your Desktop before deleting. You can then place it back after testing to see if the issue is resolved. If the figure required to check is in an External Runtime, you will need to add that one Runtime back within the Poser application to see if the problem is resolved this way.

COMPUTER > local disk C > USERS > your user account name > APPDATA > ROAMING > POSER folder"