I just released a bug fix version 5.1.1 for my Office Calculator (Free, Pro). This bug only affects people with Miscellaneous Settings / Clear Tape Interval [Never] - now it's working as expected.
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taobits.net Christof Vollrath Peter-Strasser-Weg 17 12101 Berlin Germany
Office calculator with a virtual tape,
fixed point or floating point calculator,
various rounding modes and percent calculation.
This is a calculator optimized for office tasks.