On windows, its easy,
just create the new context menu in explorer from registry. so you can right-click on the project file and choose the xojo version to open.
[code]Windows Registry Editor Version 5.00
[HKEY_CLASSES_ROOT\*\shell]
[HKEY_CLASSES_ROOT\*\shell\Open with Xojo 2014]
[HKEY_CLASSES_ROOT\*\shell\Open with Xojo 2014\command]
@=“C:\\Program Files (x86)\\Xojo\\Xojo 2014r3.2\\Xojo.exe %1”
[HKEY_CLASSES_ROOT\*\shell\Open with Xojo 2018]
[HKEY_CLASSES_ROOT\*\shell\Open with Xojo 2018\command]
@=“C:\\Program Files\\Xojo\\Xojo 2018r1\\Xojo.exe %1”
[HKEY_CLASSES_ROOT\*\shell\removeproperties\DropTarget]
“CLSID”="{09a28848-0e97-4cef-b950-cea037161155}"[/code]
Thanks
Regards
Arief