I don't know of there is a possibility of export. But the textmessages in thze history should be the same as the text messages in the sensor files.
Here is a list of the last three files (two flights - see post #36). Please compare with your display. I think it should be the same.
Flight2Log_2_ukaleq\Sensor\Sensor_00030.txt
10 00:01:30 INFO: '(3,26)ANGLE MODE'
11 00:01:30 INFO: 'Weak remote control GPS signal,Forbid set home po'
12 00:01:30 INFO: 'Weak remote control GPS signal,Forbid set home po'
13 00:01:30 INFO: 'Weak remote control GPS signal,Forbid set home po'
14 00:01:30 INFO: 'Weak remote control GPS signal,Forbid set home po'
3021 00:02:16 CRITICAL: 'CAUTION: Avionics power low: 4.68 Volt'
3022 00:02:16 INFO: 'Armed by RC.'
3023 00:02:16 INFO: '(3,14)home: 66.1651286, 29.1397061, 365.24'
3032 00:02:16 INFO: '[logger] file: /fs/microsd/log/2019-02-22/06_16_4'
3349 00:02:20 INFO: '(2,86) altitude Less than 1.5m, obs not available'
3350 00:02:20 INFO: 'Takeoff detected.'
3542 00:02:23 INFO: '(3,81) obs open'
7169 00:03:18 INFO: '(1,7)Warn geomagnetic field is disturbed.'
7603 00:03:25 INFO: '(1,7)Warn geomagnetic field is disturbed.'
Flight2Log_2_ukaleq\Sensor\Sensor_00031.txt
39 00:05:04 INFO: 'Data link #0 lost.'
40 00:05:04 CRITICAL: 'ALL DATA LINKS LOST.'
41 00:05:04 INFO: 'Data link #0 regained.'
2390 00:05:39 INFO: '(1,7)Warn geomagnetic field is disturbed.'
4083 00:06:05 INFO: '(1,7)Warn geomagnetic field is disturbed.'
4535 00:06:12 INFO: '(1,7)Warn geomagnetic field is disturbed.'
6821 00:06:46 CRITICAL: '(2,29) LOW BATTERY, RETURN TO LAUNCH ADVISED.'
6823 00:06:46 INFO: 'Altitude limit: 0 meters above home'
7176 00:06:52 INFO: '(2,86) altitude Less than 1.5m, obs not available'
7516 00:06:57 CRITICAL: 'NOT DISARMING: Not in manual mode or landed yet.'
7555 00:06:57 INFO: 'Landing detected.'
7556 00:06:57 INFO: 'Disarmed by RC.'
7557 00:06:57 INFO: 'Weak remote control GPS signal,Forbid set home po'
7575 00:06:58 INFO: '(1,7)Warn geomagnetic field is disturbed.'
7892 00:07:02 INFO: 'Weak remote control GPS signal,Forbid set home po'
8231 00:07:07 INFO: 'Weak remote control GPS signal,Forbid set home po'
8563 00:07:12 INFO: 'Weak remote control GPS signal,Forbid set home po'
8820 00:07:16 CRITICAL: 'LOW BATTERY, TAKEOFF DISCOURAGED.'
8896 00:07:17 INFO: 'Weak remote control GPS signal,Forbid set home po'
Flight2Log_2_ukaleq\Sensor\Sensor_00032.txt
46 00:01:22 INFO: '(3,26)ANGLE MODE'
47 00:01:22 INFO: 'Weak remote control GPS signal,Forbid set home po'
48 00:01:22 INFO: 'Weak remote control GPS signal,Forbid set home po'
49 00:01:22 INFO: 'Weak remote control GPS signal,Forbid set home po'
50 00:01:22 INFO: 'Weak remote control GPS signal,Forbid set home po'
52 00:01:22 CRITICAL: 'No valid position. Switching to manual mode'
127 00:01:24 INFO: 'Weak remote control GPS signal,Forbid set home po'
461 00:01:29 INFO: 'Weak remote control GPS signal,Forbid set home po'
794 00:01:34 INFO: 'Weak remote control GPS signal,Forbid set home po'
1123 00:01:39 INFO: 'Weak remote control GPS signal,Forbid set home po'
1455 00:01:44 INFO: 'Weak remote control GPS signal,Forbid set home po'
1788 00:01:49 INFO: 'Weak remote control GPS signal,Forbid set home po'
2120 00:01:54 INFO: 'Weak remote control GPS signal,Forbid set home po'
2454 00:01:59 INFO: 'Weak remote control GPS signal,Forbid set home po'
2499 00:01:59 INFO: '(1,7)Warn geomagnetic field is disturbed.'
2787 00:02:04 INFO: 'Weak remote control GPS signal,Forbid set home po'
3121 00:02:09 INFO: 'Weak remote control GPS signal,Forbid set home po'
3455 00:02:14 INFO: 'Weak remote control GPS signal,Forbid set home po'
3788 00:02:19 INFO: 'Weak remote control GPS signal,Forbid set home po'
4116 00:02:24 INFO: 'Weak remote control GPS signal,Forbid set home po'
4445 00:02:29 INFO: 'Weak remote control GPS signal,Forbid set home po'
4775 00:02:34 INFO: 'Weak remote control GPS signal,Forbid set home po'
5107 00:02:39 INFO: 'Weak remote control GPS signal,Forbid set home po'
5440 00:02:44 INFO: 'Weak remote control GPS signal,Forbid set home po'
5769 00:02:49 INFO: 'Weak remote control GPS signal,Forbid set home po'
6101 00:02:54 INFO: 'Weak remote control GPS signal,Forbid set home po'
6434 00:02:59 INFO: 'Weak remote control GPS signal,Forbid set home po'
6768 00:03:04 INFO: 'Weak remote control GPS signal,Forbid set home po'
7094 00:03:09 INFO: 'Weak remote control GPS signal,Forbid set home po'
7420 00:03:14 INFO: 'Weak remote control GPS signal,Forbid set home po'
7753 00:03:19 INFO: 'Weak remote control GPS signal,Forbid set home po'
8082 00:03:24 INFO: 'Weak remote control GPS signal,Forbid set home po'
8410 00:03:29 INFO: 'Weak remote control GPS signal,Forbid set home po'
8737 00:03:34 INFO: 'Weak remote control GPS signal,Forbid set home po'
br HE