Hi, Just updated LR with no issues, except the almost-non-issue of a blank value in the dropdown.
The short solution: just select a value from the dropdown
Also, is this a UI bug? Why would the Fill dropdown be blank? There IS a default item in the dropdown list.
What I found:
In the preferences file, the background color of the user interface and secondary monitor are defined by the following variables:
AgCommonUI_backgroundShade
AgMultiMonitor_backgroundShade
In some cases the previous version had 0.5 as the default value for both variables while the latest one just do not include the variable in the preferences file when the default is selected.
So there is no need to reset preferences or edit the preferences (it is just a plain text file anyway), just select the desired value in the droprowns.