How do I change the default LumenRT Save location to D Drive? - C Drive (SSD) keeps filling up!

How do we change the default LumenRT save path from C Drive -> users -> documents -> Bentley etc?

I moved my documents folder to my D Drive (3TB) as my C Drive is a 256GB SSD. Our average LumenRT file is 2-4GB, but LumenRT is still saving to the old scenes folder on the C Drive!

Could not find the option in any of the settings - Please help as moving files is a pain (the recent files list can't find them once moved).