Hello,
LWCAD 4.x and LWCAD 5.x can be both installed to the same LightWave. However versions 5.2 and 5.2504 are both 5.x and they are installed to the same place so latest installed version overwrites previous (message in installer is therefore correct).
It is possible to install both versions at the same time to the same LightWave but you have to do it manually.
Hello,
LWCAD 4.x and LWCAD 5.x can be both installed to the same LightWave. However versions 5.2 and 5.2504 are both 5.x and they are installed to the same place so latest installed version overwrites previous (message in installer is therefore correct).
It is possible to install both versions at the same time to the same LightWave but you have to do it manually.
Miroslav Kovac, WTools3D developer