I read this ages ago in the Help section of this website: "DO NOT install Invision to a path that contains a space in it.", ie for example:
"C:/Program Files/mIRC/Invision".
I have assummed the contrary for the new build of Invision 2.0 (3515), since the default installation for mIRC 6.12 and Invision 2.0 (3515) installs it all in the path I have just mentioned.
I have noted that the above recommendation is still on the website completely unchanged. Is this still true for the new build?? So far I have had no problems with Invision, installed in the path above.