One way to disable the Session restore question (after the browser has crashed/been turned off hard) on Opera 8.54 is to delete the files that hold the session data.

DEL /Q "C:\Program Files\Opera\profile\sessions\autosave.win"
DEL /Q "C:\Program Files\Opera\profile\sessions\autosave.win.bak"

This can be scripted together with the launch of the browser so that batch(.bat) file could look like:

DEL /Q "C:\Program Files\Opera\profile\sessions\autosave.win"
DEL /Q "C:\Program Files\Opera\profile\sessions\autosave.win.bak"
"c:\Program Files\opera\opera.exe" %1

note: the %1 means to insert the first argument given to the batch file here. So if this is called “opera.bat” and you would call it with “opera.bat www.f15ijp.com” it would open this url.

To set up Opera so that crash-recovery and splash screens are disabled you can do the following:

On Opera, type opera:config in the url bar to edit configuration.
Modify the configuration:
Recovery Strategy = 0
and
Uncheck Show Problem Dialog