os realestae 3.0.2 extension update error

hi Dam
how are you ?

I get this updates and error as attached photo
OS Property Update Package
Site
Package
3.0.1
3.0.2
N/A
Update
then after update I get this
Fatal error: require_once(): Failed opening required '/home/hassan501/public_html/administrator/components/com_osservicesbooking/helpers/helper.php' (include_path='.:/usr/lib/php:/usr/local/lib/php') in /home/hassan501/public_html/plugins/installer/osproperty/osproperty.php on line 20


and again I request for QAR currency because I don't know how to make it you do it for me before one year but now I make new website and really I need your help for this

Hi Hassan,
I confirm the issue, i have just fixed it and update into OS Property 3.0.2. Please click on My Downloads at the top to download and install OS Property again to get the issue solved.
Thanks
Dam

ok I will try now

Yes Thank you its solved

but I still don't know how to add QAR Currency please help me to get this