OpenCalc v1.1.10 buildfix171 - Windows

Choose View > Financial for the HP 12C-style RPN keypad.
Press f or g to show that layer's functions on the buttons.
Keep calc.tooltip and Help beside the executable. Right-click any key and choose What's This? for all three function layers in your selected language.

RPN example: 2 ENTER 3 + gives 5.
Financial example: 360 n, 6 g i, 200000 PV, 0 FV, PMT gives -1199.10.
Registers and programs are saved in OpenCalc-financial.cfg; language and other settings remain in OpenCalc.cfg.

Run OpenCalc.exe. The Help menu opens the localized HLP manual.

See BUILD171-VALIDATION.md for tests and compatibility notes.

Back deletes the last digit during entry. CE clears the current entry. The HLP financial chapter includes current keypad screenshots and reference tables in all four languages.

Financial keyboard: Enter = RPN ENTER; Backspace = Back; Delete = CE; Y = power; F/G = shift layer; N/I/P/M/V = n/i/PV/PMT/FV; S/R = STO/RCL; X = exponent entry. The number pad is supported.

The former ON position is an empty sunken field; the original financial key layout is retained.
