The project configuration file (.pbp) has the "data" section. The entry <log show="0"/> causes a IDE crash immediately after clicking on the text in any editing window. Changing this entry to <log show="1"/> fixes the problem.
PB version 6.30, (PureBasic_Linux3_X64_6.30),
Platform: Linux Mint Debian Edition 7 Cinnamon 64-bit.