Upgrade to version 5 crashes my older computers

I've run ccleaner almost since it's inception on all my computers. Since I buy good stuff and care for it they stay functional (to us) in some capacity for a long, long time. I've upgraded to ccleaner version 5 on all our systems but two of them can't run it at all no matter what I've tried and the only solution was to uninstall v5 and revert back to the most recent v4 I was able to find. The laptops in question have a Pentium ULV 1.1GHz (from 2005) or a Core 1.2GHz (from 2007) processor. Just opening version 5 on either machine was a slow grind of a process where (each time I tried) I was never sure it would even open, but eventually it did. Then just navigating to any option (without even clicking a box or choosing something to run) was enough to give white screens and minutes later messages that ccleaner had stopped responding. Since these are old computers I have a bare minimum of installed programs and anything not absolutely needed is set not to even load unless I ask it to. The only change made to each prior to the constant crashing was the change from version 4+ to version 5. Then when nothing seemed to get the new version to function I uninstalled it, went back to v4 and all worked as acceptably as it did before I installed v5. The new version works OK on all of our other desktops and laptops, though I've yet to see any of the claimed improvements (and I wouldn't call the UI an improvement but that's personal taste). Is there something substantially different in v5 that causes this crashing of computers with older processors and can that be tweaked by YOU or by an option provided to the USER to make it work by decreasing functionality? I can do without most of what ccleaner has been made to do in 2014 if a limited-function v5 can work. If not, can you provide the last working v4 for download for those of us who need it? I don't expect v4 to ever be updated, and all I really need it for in these computers (I'm using only as music servers and for internet radio) is ccleaner's easy way to delete some accumulated browser or WMP data and to keep the system start-ups under control when I update stuff like drivers, flash or java and they insist on adding things at start when I tell them not to during the update process. I can't seem to find many others with my complaint but I doubt many others still have working computers made as far back as 1997 either! Thanks.

Oh, I was able to get the last v4 location from another post directing us to FileHippo (Thanks). And in case anyone needs to know both of the old systems have 2GB of RAM, were upgraded to Win7 Home Premium with a clean install about 6 months ago, everything functioned and worked well after those upgrades from XP or Vista, and after reverting back to ccleaner v4 all is again just fine. It's just the change to v5 and asking it to run that caused crashing. I have v4 set not to monitor and that setting was retained in my attempt to upgrade to v5.