You could make a button & set a high value, like
Set ADMIN=Toggle,600which would set the admin mode for 10 hours. However, it is not recommended:
[url]Why NOT to run Opus as Administrator under UAC]
If it is your own computer, you could grant the needed permissions of your drives to the current user
to avoid that hassle. That would be, for NTFS drives, under the properties under the "security" tab.