REVISION INFO:

archCalc 1.9.2
~ fixed issue affecting regional OS settings which utilize a delimiter other than a period for the decimal symbol. (sorry to all the europeans using a comma decimal format for whom the calc was not working - i feel like a stereotypical dumb american for missing that one ;)

archCalc 1.9.1
~ added preference window
~ option to auto check for updates once a week
~ mac option for transparency when inactive
~ mac version can minimize to dock and automatically un-minimizes when application is reactivated
~ windows version ships with installer/uninstaller

archCalc 1.9
~ intel native support for mac
~ mac & windows version should now be identical in terms of features
~ added check for new version menu item
~ added tape below calc so both can be seen at same time
~ added ability for calc to remember position and size between sessions
~ buttons rounded
~ changed toggle buttons to be more intuitive & grouped english & metric buttons
~ changed menu shortcuts
~ added ability to skip splash screen once registered
~ added ability to print tape
~ changed the way the +/- button works to be more intuitive & useful (no-longer interrupts entering a formula when pressed, just changes sign of what is entered)
~ lots of smaller bug / consistency & usability fixes

archCalc 1.8.1
~ fixed bug which affected negative fractional units other than foot-inch
~ released windows version 1.8.1

archCalc 1.8
~ resizable display
~ lock button for units / LCD to force all display to a given LCD / unit type
~ shift + 2 or "@" allows for direct square unit entry (note: sq' or 'sq both work)
~ shift + 3 or "#" allows for direct cubic unit entry
~ improved tape display to include feedback from all functions
~ recompiled for improved compatibility with os 10.4 and windows xp

archCalc 1.7
~ much improved tape clarity
~ option clicking tape entries enter numbers back into calculator.
~keyboard shortcut changes:
1/64 changed to shift command 6 item
mm changed to command L
centimeters changed to command S
~fixed bug which would round off numbers inconstantly with lcd pulldown menu.

archCalc 1.6
~ fixed support for direct input of mile units "e"
~ memory button added functionality of +/- button.
~ changed creator code to comply with mac guidelines.
~ help tags expanded
~ fixed date glitch in nagware (sorry!)
~ global floating window implemented in windows version
~ fixed bug affecting some windows platforms: no longer beeps repeatedly after quitting.
~ help access moved to calculator tab
~ fixed bug affecting proper display/content of help on some systems
~ keyboard shortcut added for mm, command + option + M
~ added shift + "/", option + "/" and alt +"/' as keyboard shortcuts for divide
~ more reliable handling of negative numbers in foot inch units.
~ keyboard shortcuts added to windows versions

archCalc 1.5
~ retooled to work with mac OSX, Classic and Windows.
~ triangle solve functions added
~ trig functions added, sin, asin, cos, acos, tan and atan. all work with degrees not radians
~ help menu item added
~ help tags added

archCalc 1.04
~ "x^2" (square) button issues fixed (units kept track of properly)
"+/-" button works better it makes a number negative, but is still striping units if a negative number is made positive (working on it).
~ register now clears if new calculation is entered after "=" is pressed.

archCalc 1.03
~ pull down menus only highlight when conversion is possible e.g. after a number is displayed, and not during input, to make conversion more intuitive, and avoid mistakenly using pull down menus to specify units on input.
~ input error after "x^2" "√" or "1/x" fixed, no longer inserts new input before the answer being displayed. display is cleared and new input enters on a blank edit field.

archCalc 1.02
~ "nu" (no unit) fractional input now excepted.

archCalc 1.01
~ window menu added with hot key for visible and minimizing the window.
~ interface made slightly more compact
~ minor math issues fixed
~ mile designation changed from "l" to "e" to avoid confusion with "1"

archCalc 1.0
~ released