Ok.
When I tried to change the same 'Format' from English to Russian and back, I noticed no changes. I don't think that setting helps at all for this problem. You can probably leave that in Russian.
However, on that same window, if you click the last tab at the top 'Administrative' and then 'Change System Locale' you can change that to English. When I used Russian for the System Locale, then I was getting the question marks instead of the cent symbol.
So try changing the System Locale to English, and then testing to see if it works, and also test the secret hotkey as well.
When I tried to change the same 'Format' from English to Russian and back, I noticed no changes. I don't think that setting helps at all for this problem. You can probably leave that in Russian.
However, on that same window, if you click the last tab at the top 'Administrative' and then 'Change System Locale' you can change that to English. When I used Russian for the System Locale, then I was getting the question marks instead of the cent symbol.
So try changing the System Locale to English, and then testing to see if it works, and also test the secret hotkey as well.