Starting from v4.20 RedCrab has a freeware and a shareware (RedCrab Plus) version.
Update Version 4.21 26.06.2012
The display settings of FIX and FLT buttons, number of displayed digits and the EXP (exponent) are saved to data files. Reload of the files restores the settings.
The Freeware can load data sheet which includes shareware programs and the worksheet is free to use. But the program code is read only and file saved is disabled.
Bug fix in display module
Shareware bug fix:
Invalid symbols in program code can freeze the program.
Bug in Undo function fixed.
Problem with saving of PHP files fixed.
Can somebody take a look at it?