OK, I figured out a work-around...
Problem:Unable to install SampleTank/Syntronik instrument libraries to a custom folder/non-OS drive. The "Install To" function in IK Product Manager tries to achieve this, but in the DAW the libraries don't show up in both SampleTank and Syntronik even with the custom folder path set in settings. You are no longer able to select the 'Install to' function as Product Manager says the libraries are already installed (marked in green). The only option is to 'Reinstall'. When you try to "Reinstall" the libraries from IK Product Manager, it defaults to putting them on your C drive!
Many of us have smaller SSD C drives which are dedicated to Windows and apps, not rompler samples, so this is a problem putting 10+ gb of samples on our Windows drive.
My solution/work-around:Let Product Manager "re-install" to the default C drive locations. Go into your DAW, open SampleTank and Syntronik and look for the folder paths in Settings.
For
SampleTank (required install for Syntronik to work):
C:\Users\Public\Documents\IK Multimedia\SampleTank 3C:\Users\Public\Documents\IK Multimedia\SampleTank 4For
Syntronik:
C:\Users\Public\Documents\IK Multimedia\Syntronik 2The contents of these paths should contain folders like Effects Presets, Instruments, Library Info, Library Resources, Multis, Samples.
Move (not copy/paste, but move) these content folders to your desired custom location. For myself, they are:
D:\Music Production\VST\IK Multimedia\SampleTank\Moved from C Drive (ST3)
D:\Music Production\VST\IK Multimedia\SampleTank\Moved from C Drive (ST4)
D:\Music Production\VST\IK Multimedia\Syntronik\Moved from C Drive
In each of these folders I put a WIndows Shortcut back to their C Drive locations, for convenience if I need to move them back in future (if something breaks, ie updating Syntronik).
Now go back into your DAW, open SampleTank and Syntronik, and REMOVE the default C drive paths from the folder locations in settings - and then ADD your custom paths. Now SampleTank and Syntronik are only looking for instrument libraries on your custom path.
Hit 'Rescan' of libraries and it should find them all in the new location. Done!
It's a shame that IK Product Manager couldn't achieve this simple task, and got caught in a loop of reinstalling to default locations.