After upgrade to 7.5, the Technology dropdown on an indicator does not show any items. Cannot update value.
An enhancement in 7.5 only shows Technologies that are valid for the indicator type for the indicator. You will need to open the indicator type (you can do this by double-clicking the icon beside the indicator type on the indicator), hit the edit button and got to the Technologies tab to add the Technologies you require. Once you have added the Technologies and pressed Okay, you will be able to choose them on any indicator with that type.
After 7.5 upgrade it is required to activate all (or essential technologies) on each indicator type. Then selected Technologies will be available on Indicators. To get to all indicator types:
Navigate to Enterprise level site à Indicators view à Settings à Indicators à Indicator types tab.
7.5 Readme, APM Help