This is an old license (for version 3.0.5.1-win_32) file, maybe works for this version too.
1- Copy this license to a text file named "dummy_license.txt" inside "C:\dvt_eclipse\bin" folder. 2- Create an environment variable named "DVT_LICENSE_FILE" inside C:\dvt_eclipse\bin\eclipse.bat and point this variable to the license file.
LOCAL dvt_e 25-nov-2011 31-dec-2020 "License created by Top" ANY FE3416C7CBC61C4BEC333867B9A895FA
LOCAL dvt_sv 25-nov-2011 31-dec-2020 "License created by Top" ANY A70E07018BE401426F83E57C83775981
LOCAL dvt_vhdl 25-nov-2011 31-dec-2020 "License created by Top" ANY 272A0574DB49CA956A596FE02B01DADE
LOCAL dvt_verilog 25-nov-2011 31-dec-2020 "License created by Top" ANY 99E50796B472E4401DCD768A674192A4
LOCAL dvt_edebug 25-nov-2011 31-dec-2020 "License created by Top" ANY 61EEB794ABF2B44365C562894F142D64
LOCAL dvt_svlint 25-nov-2011 31-dec-2020 "License created by Top" ANY CDF9DBA6ED033A6A50FA7D57D63437CF
LOCAL dvt_core 25-nov-2011 31-dec-2020 "License created by Top" ANY FBABB913C70B9F5F574D331675CB279F