"Older" browser support PLEA

Hi - simple plea...

Please remember there is a whole world of users out there not on cutting edge hardware.

Just upgraded to 9.31 and it seems multigraphs no longer work on browsers on android 2.4 and 4.4.

Even Chrome on android 4.4 does not enable use of the 9.31 multigraph buttons.

As a temporary fix is it possible for me to run two versions of emoncms (say /emoncms and /emoncmsOld) on the same database/data files? Or are there, say, file locking issues which could cause corruption?
I could update (http post) via /emoncms only and display using either /emoncms or /emoncmsOld.