Do I need to update?

Yes.

Version 5.15 enables the use of the EPO account with two-factor authentication.

This release includes a new version of the thin client, which must also be updated in order to use two-factor authentication.

From 1 January 2025 electronic filings made using versions of the EPO Online Filing (OLF) software earlier than version 5.15 (build 5.0.15.184) will no longer be accepted by the EPO's receiving server, see OJ EPO 2024, A89.