@mwb1100 I have learned in the last 15 years of using applications and developing software that 99.8% of all users of Windows, Linux and Mac really never use the modifier keys - Alt+ shortcuts - for opening a menu, executing a menu command, activating a button, toggling an option, setting focus into an edit field.
I work together with 100 colleagues in our company and I know that I'm the only one using Alt+ shortcuts at all. I'm quite sure that nobody of IDM uses them taking into account how often I wrote already during beta testing of UE/UES for Windows emails about setting up modifiers better for new commands in menu and new or redesigned dialogs with a concrete suggestion for English version.
And I know from product managers and GUI developers in my company that modifiers are completely outside of their awareness. The only chance to get well defined and working Alt+ shortcuts is: reporting, reporting and reporting, best on every new version released with no improvement on this area. Yes, it is really necessary to become a nuisance, always friendly of course, but very firmly. I have done that in the past for UC/UE/UES/US and other applications very, very often and finally at some time a version of the application was released with improved Alt+ feature working as requested several times.
Another problem is that there are many terms for Alt+ modifiers (shortcuts, hotkeys, command keys) as most people even those using this feature regularly don't know how this feature is called at all. This results often in different reports about in real same issue all added into same issue database. So I'm quite sure your report from June 2015 is in the issue database (of course with very low priority for the reasons above), but was not found by support team member because of using different words explaining the same issue.
Best regards from an UC/UE/UES for Windows user from Austria