I too would love to see sw00000p publish the proof to back up his statement that installing an owned previous version of rather iClone or 3DXchange is in any way illegal.
The EULA clearly states that we may install 2 copies of a given version without any problems. It has also been stated on the forum by many RL employees that a user can have previous versions of the software installed on one system - it has even often been stated that keeping an older version of the software installed can help resolve problems when trying to complete projects before moving on to the newer version.
I have an XP boot hard drive with IC 3, 4 and 5 installed - and have never received any letters from the RL legal dept. telling me to remove any of them.
I also politely ask sw00000p to compose his answer using standard English sentence conventions - this may be difficult for a non-native speaker, but there are tools like Google to help with the translation.
System: Win 10 Pro (20H2), Asus X99-E WS, CPU i7-5930K -3,5 GHz, 32 GB DDR4 2666-16 RAM, NVidia GTX 1080 Ti GPU - 11 GB VRAM(Driver Studio-457.30), Samsung 850 Pro 512 GB SSD, 6 TB HD storage.