Yes, it's possible to use old lc.exe core file in a new installation. But some new effects will not work. SHOWGUN for example.
Version 243 can works faster on low-end videocards only. For Middle and High-End ranges the version 301 is much more faster. Please look at the
http://lightconverse.net/lc/download/lc ... chmark.pdf for graphic cards performance comparison.
