.PLUS RepliCAM supports both metric as well as English units. You can change the units at any time. Go to Settings-> Unit settings. From this you will get dialog box as shown below.
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In this dialog box just click on arrow so you will get different type of units like inch, feet, mm, m and etc.
For Units in fractional Inches the units can be input in following ways (say 1/32 is the display precision).
Consider you have to input 6.25 inches. It can be input in one of the following ways
6.25 or 6.25” or 6 1/4 or 6 1/4" or 6 8/32 or 6 8.