@Yvesab - Which version of Daz Studio are you using? You do not have to have the premier version, if you do not want the basic just go to the next one. Watch for sales on the membership, I think they just had one. You do not have to use G9, stick the the older versions. You say that opening the program is extremely slow. Do you have any outdated plugins installed, if so disable them/uninstall them. Update your graphic card drivers. Install the latest version of Daz, not the beta version. You might try running something like CCleaner to optimize your system. If your registry is corrupted it can affect Daz Studio.  Look at your Daz log to see what is causing your problems.