Thanks for answers!
Eric, I just want to try all options before asking support.
Nathan, this is the list of licences, so all should be ok:
tmsh show sys license
...
Active Modules
LTM, 5 Gbps, VE
IPV6 Gateway
Rate Shaping
Ram Cache
...
PEM, VE
Routing Bundle
Also, list of errors from ltm after restarting:
err mcpd[16009]: 01180005:3: Evaluation license has expired.
err chmand[15629]: 01180005:3: Evaluation license has expired.
emerg mcpd[16009]: 01070608:0: License is not operational (expired or digital signature does not match contents).
err mcpd[16009]: 01070356:3: Cookie persistence feature not licensed.
err mcpd[16009]: 01070356:3: Destination address persistence feature not licensed.
err mcpd[16009]: 01070356:3: Universal and hash persistence feature not licensed.
err mcpd[16009]: 01070356:3: MSRDP persistence feature not licensed.
err mcpd[16009]: 01070356:3: SIP persistence feature not licensed.
err mcpd[16009]: 01070356:3: Per-invocation log rate exceeded; throttling.
err mcpd[16009]: 01070356:3: Load balancing feature not licensed.
err mcpd[16009]: 01070900:3: Incorrect number of fields: /Common/eam - class cnt: 0 instance cnt: 8
err tmsh[18092]: 01420006:3: Loading configuration process failed.
emerg load_config_files: "/usr/bin/tmsh -n -g load sys config partitions all" - failed. -- 01070356:3: Load balancing feature not licensed. Unexpected Error: Loading configuration process failed.
err mcpd[16009]: 01070425:3: Full configuration load failed.
notice sod[16369]: 010c0063:5: Waiting for Mcpd without a response. Try again...