Has your Roland MPX-90/95 suddenly stopped working? (New info.)
I narrowed down the update that I think was causing the MPX-95 not to work correctly. The name is Security Update KB5000802 (or KB5000808 on some machines). This way, if you so choose to uninstall this update, you can still benefit from the OTHER updates that are included with the latest Windows 10 version, while steering clear of the problematic update. I am hopeful that there will be a solution soon since security is not really something we should have to compromise with, time will tell.
That being said, If you want to selectively uninstall an update, type in "Update" in the Windows 10 search box and go to Check for Updates. From there select View Update History > Uninstall Updates > highlight the problematic update> click the tiny Uninstall word-button up top.