The Qlik February 2020 release has been delayed by a couple of weeks due to a security vulnerability that recently surfaced with Node.js, which is impacting a large portion of the software industry. The release is expected to be delivered before the end of the month, with a target date of February 25th, as Qlik is actively running tests to ensure that the February GA release is stable and not affected by this security malware. To read more about this vulnerability:
The legacy logging framework is still available in Qlik Sense, but the logs are as of Qlik Sense version 2.0 referred to as trace logs. The log files remain the same, in the old logging format, but they are stored in a new location.