Since I recently faced the same challenge of importing a survey created with Limesurvey v 5.x into an older 3.x version, I am sharing my solution:
Export the survey at LS 5.x as tab separated value format
Open the TXT file with a text editor
Remove these two rows:
ipanonymize
tokenencryptionoptions
Save as TXT file
Import at LS 3.x
Depending on your survey structure and complexity, there could be further challenges to solve.
For me this worked for a multilingual survey with ~80 questions.
Best regards/Beste Grüße,
Dr. Marcel Minke Need Help? We offer professional Limesurvey support:
survey-consulting.com Contact: marcel.minke(at)survey-consulting.com
Let me add an initial step #0: Make sure that at any survey setting at LS 5.x you do NOT use "inherit" as setting. Instead, set a certain setting for every such value.
Best regards/Beste Grüße,
Dr. Marcel Minke Need Help? We offer professional Limesurvey support:
survey-consulting.com Contact: marcel.minke(at)survey-consulting.com