In the [software] section of the Probewin.ini file (usually found in the C:\ProgramData\Probe Software\Probe for EPMA folder), the keywords are:
AnalyticalTotalMinimum="95"
AnalyticalTotalMaximum="105"
The AnalyticalTotalMinimum value must be greater than 50 and the AnalyticalTotalMaximum value must be less than 150.