Klever 3.6 was released pretty soon after Klever 3.5 since we updated Clade and CIF in the backward incompatible manner. This means that the new version of Klever requires all build bases to be regenerated with the new version of Clade and CIF installed together with Klever. You can download build bases for Linux 5.5.19, 5.10.120 and 5.17.13 as well as sample build bases prepared ahead of time. Corresponding files are available either directly from the "Files" tab or from the Klever tutorial.
Other changes in Klever 3.6 are new models for struct_size() and underlying __ab_c_size() for the Linux kernel.