1. Trigger level settings in C/D port are modified.
2. The problem that high level changes to low level during using noise filter function of
LAP-B(702000X) under VCC voltage is modified.
3. Support saving font settings defined by users during file saving.
4. The problem that the software will close abnormally when using noise filter function of
LAP-B(702000X) is modified.
5. Trigger voltage can be set after the software started or during settings being modified.
6. Support exporting one waveform file.