Save a place not working - Joomla 3.4.2

Hello,
The Gmap component not working on Joomla 3.4.2

I have download the free version for joomla 3 (com_GMapFP_j3_27F) and I can't save, save&close or cancel a place. The btn not working.

Some people from the forum have the same problem....

How can I fix it?

Hi,
First of all thanks for quick answer.

I download and install the new version but when I try to save a place in Greek Language I take this error :

Fatal error: Call to undefined method JDate::toFormat() in /home2/mypcss/public_html/.../administrator/components/com_gmapfp/tables/gmapfp.php on line 34

The alias in greek language is causing trouble...
How to solve this issue?

Thanks in advance!