You should be good to go then! Those I actually backed up from the drive 10 following the eventual clean install there while they were seen on the 7 drive when the clone and fresh 7 install both failed to upgrade during the first day. That first upgrade over the previous 7 host was to fail as well until the extra storage drives were found to be the problem but still seeing the same two temp folders behind.
On the upgrade the 10 VM just saw here no BT or WS folders appeared when the 10565 or rather 10-565 the way that should be looked at being W10 Build 565 upgraded over the 10240 seeing the Install button in the Advanced options when checking up on things once the "Get Insider builds" option was set to go! With the Fast not Slow option set the day wait went fast for seeing the WI build ready to install.
That was a planned upgrade that took place there however in order to examine the progress with things like Edge made since the 10240 was seen available back on July 29th. The VM will upgrade itself with the next build to follow hopefully before the present build on the VM expires without ever seeing activation status. As you can see you don't get any temp keys to use when using this type of option.
You can see the watermark if you look closely down at the lower right hand corner indicating it being an Insider build for evaluation, testing purposes only. But the VM option works out for a look at the latest as well as any other OS without interfering with the present version of Windows you have on. VMs are relatively easy to set up and replace as you go along without any worry about unintended upgrades or viruses even since they can also act like a filtering process when going to try out some new download on the VM which can be nuked completely at a moment's notice if any bugs should be discovered as well as being able to run multiple OSs of choice on a single host OS. A good way to look at Windows 10 as well as any other OS! VMware Player - Install Windows 10 - Windows 10 Forums